Canisters with engine oil are on sale at the shop of a BP petrol station in Moscow, Russia, July 4, 2016. REUTERS/Sergei Karpukhin

Toyota Motor Corp's Executive Vice President Mitsuhisa Kato (top R) and chief engineer Koji Toyoshima pose with the company's new Prius hybrid car during its Japan launch event in Tokyo, Japan, December 9, 2015. Toyota Motor Corp said on Wednesday its new Prius would start at 2.429 million yen ($19,785) in Japan and that it would aim to sell 12,000 of the petrol-electric car each month in its home market. REUTERS/Toru Hanai

Vehicles, including fire engines, are parked near a fuel depot which is on fire near Vasylkiv, Kiev region, Ukraine, June 9, 2015. Emergency services struggled to prevent the spread of a deadly fuel depot fire outside Kiev on Tuesday and three firemen were reported missing after the blaze triggered a powerful explosion. The fire burned overnight and by morning had spread to at least 16 tanks, most of them storing petrol. That sent a huge pall of black smoke over the area surrounding the depot near Vasylkiv, 30 km (19 miles) from Kiev. Picture taken with a fish-eye lens. REUTERS/Valentyn Ogirenko

Fire engines are parked near a fuel depot which is on fire near Vasylkiv, Kiev region, Ukraine, June 9, 2015. Emergency services struggled to prevent the spread of a deadly fuel depot fire outside Kiev on Tuesday and three firemen were reported missing after the blaze triggered a powerful explosion. The fire burned overnight and by morning had spread to at least 16 tanks, most of them storing petrol. That sent a huge pall of black smoke over the area surrounding the depot near Vasylkiv, 30 km (19 miles) from Kiev. REUTERS/Valentyn Ogirenko

Vehicles, including fire engines and ambulances, are parked near a fuel depot which is on fire near Vasylkiv, Kiev region, Ukraine, June 9, 2015. Emergency services struggled to prevent the spread of a deadly fuel depot fire outside Kiev on Tuesday and three firemen were reported missing after the blaze triggered a powerful explosion. The fire burned overnight and by morning had spread to at least 16 tanks, most of them storing petrol. That sent a huge pall of black smoke over the area surrounding the depot near Vasylkiv, 30 km (19 miles) from Kiev. REUTERS/Valentyn Ogirenko

A man works on the engine of his car, as motorists gather at a petrol station of state-owned energy company Nigerian National Petroleum Corporation (NNPC) in Abuja, Nigeria May 25, 2015. Chronic fuel shortages in Nigeria brought phone firms, banks and flights to a standstill on Monday, just four days before Muhammadu Buhari's inauguration as president of Africa's biggest economy and top oil exporter. REUTERS/Afolabi Sotunde TPX IMAGES OF THE DAY

Mazda Motor Corp President and CEO Masamichi Kogai speaks in front of a screen showing the company's Skyactiv-D 1.5-liter clean diesel engine during a news conference to announce the Mazda CX-3 compact crossover SUV in Japan in Tokyo February 27, 2015. Japan's Mazda Motor Corp will sell only diesel-powered cars in the domestic launch of its key model for 2015, gambling it can convince the country's army of hybrid petrol-electric drivers that the days of sooty, noisy diesels are long gone. REUTERS/Toru Hanai (JAPAN - Tags: BUSINESS TRANSPORT)

Somali engineer Aways Jama Warsameh gives order during the construction of a petrol station in Mogadishu September 24, 2013. REUTERS/Omar Faruk (SOMALIA - Tags: SOCIETY BUSINESS)

Worker assembles an engine for a new Porsche 918-Spyder sports car at the production line of the German car manufacturer's plant in Stuttgart-Zuffenhausen July 2, 2013. REUTERS/Michaela Rehle (GERMANY - Tags: BUSINESS TRANSPORT)

A man rides a bicycle fitted with a petrol engine in Havana July 11, 2013. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY TRANSPORT)

A Soviet-era Moskvich car is driven as a man holds a bottle of petrol to feed the carburetor to run the engine in Havana May 28, 2013. Russian state-owned oil company Zarubezhneft said this week it was giving up for now on a problem-plagued exploration well off Cuba's north-central coast, which brings to an end the communist-led island's only active project in its search for offshore oil fields. The news was not all bad because the company said it would return to the same spot next year. But it was another blow to Cuba's hopes for energy independence, which have acquired new urgency with the March death of Venezuelan President Hugo Chavez, the communist-led island's top ally and benefactor. Picture taken May 28, 2013. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY TRANSPORT ENERGY BUSINESS)

A Soviet-era Moskvich car is driven as a man holds a bottle of petrol to feed the carburetor to run the engine in Havana May 28, 2013. Russian state-owned oil company Zarubezhneft said this week it was giving up for now on a problem-plagued exploration well off Cuba's north-central coast, which brings to an end the communist-led island's only active project in its search for offshore oil fields. The news was not all bad because the company said it would return to the same spot next year. But it was another blow to Cuba's hopes for energy independence, which have acquired new urgency with the March death of Venezuelan President Hugo Chavez, the communist-led island's top ally and benefactor. Picture taken May 28, 2013. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY TRANSPORT ENERGY BUSINESS)

A motorcyclist carries fuel containers after filling them up from a petrol station as he passes other motorists in queue in Toukh, El-Kalubia governorate, about 25 km (16 miles) northeast of Cairo March 12, 2013. Egypt's oil minister Osama Kamal has dismissed the head of state-owned Misr Petroleum and another top official due to a crisis in distributing fuel used by buses and trucks, state news agency MENA said. The country is working on an economic programme where it plans to cut back on subsidies of fuel. Last year it eliminated subsidies on 95-octane gasoline, the highest grade available, and it raised fuel prices in many sectors last month. In July the government plans to start a scheme to ration subsidised motor fuel using smart cards available to drivers of vehicles with smaller capacity engines. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS ENERGY)

Vehicles queue at a petrol station in Toukh, El-Kalubia governorate, about 25 km (16 miles) northeast of Cairo March 12, 2013. Egypt's oil minister Osama Kamal has dismissed the head of state-owned Misr Petroleum and another top official due to a crisis in distributing fuel used by buses and trucks, state news agency MENA said. The country is working on an economic programme where it plans to cut back on subsidies of fuel. Last year it eliminated subsidies on 95-octane gasoline, the highest grade available, and it raised fuel prices in many sectors last month. In July the government plans to start a scheme to ration subsidised motor fuel using smart cards available to drivers of vehicles with smaller capacity engines. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS ENERGY)

A petrol station worker argues with people as vehicles queue at a petrol station in Toukh, El-Kalubia governorate, about 25 km (16 miles) northeast of Cairo March 12, 2013. Egypt's oil minister Osama Kamal has dismissed the head of state-owned Misr Petroleum and another top official due to a crisis in distributing fuel used by buses and trucks, state news agency MENA said. The country is working on an economic programme where it plans to cut back on subsidies of fuel. Last year it eliminated subsidies on 95-octane gasoline, the highest grade available, and it raised fuel prices in many sectors last month. In July the government plans to start a scheme to ration subsidised motor fuel using smart cards available to drivers of vehicles with smaller capacity engines.REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS ENERGY)

A motorcyclist carries fuel containers after filling them up from a petrol station in Toukh, El-Kalubia governorate, about 25 km (16 miles) northeast of Cairo March 12, 2013. Egypt's oil minister Osama Kamal has dismissed the head of state-owned Misr Petroleum and another top official due to a crisis in distributing fuel used by buses and trucks, state news agency MENA said. The country is working on an economic programme where it plans to cut back on subsidies of fuel. Last year it eliminated subsidies on 95-octane gasoline, the highest grade available, and it raised fuel prices in many sectors last month. In July the government plans to start a scheme to ration subsidised motor fuel using smart cards available to drivers of vehicles with smaller capacity engines. REUTERS/Amr Abdallah Dalsh (EGYPT - Tags: POLITICS ENERGY)

Lowell Paddock, president and managing director of General Motors India, speaks during the launch of Chevrolet Sail U-VA car in New Delhi November 2, 2012. The Chevrolet Sail U-VA hatchbacks will be available in both 1.2-litre Smartech petrol and 1.3-litre SDE Smartech common rail diesel engines. REUTERS/B Mathur (INDIA - Tags: TRANSPORT BUSINESS ENERGY)

An employee walks past engines at the General Motors Powertrain-Uzbekistan plant in Tashkent August 31, 2012. Ninety-four percent of new cars sold in Uzbekistan last year were made by General Motors - the biggest share of any market served by the U.S. auto giant. That General Motors should have a foothold in the reclusive former Soviet republic owes much to the technology and capital it brings to a country which, under veteran President Islam Karimov, has been the graveyard of many foreign ventures. Picture taken August 31, 2012. To match story GM-UZBEKISTAN/ REUTERS/Shamil Zhumatov (UZBEKISTAN - Tags: BUSINESS EMPLOYMENT TRANSPORT)

FOR BEST QUALITY IMAGE ALSO SEE: GM1E98S11NL01

A worker tries to fix a Peugeot engine at a car scrap yard in the central Bosnian town of Zenica August 15, 2012. Europe's second-largest car maker posted a 662 million euro ($800 million) first-half loss in its auto division, dragging its group bottom line into the red - as it had warned earlier this month when announcing 8,000 French job cuts and a plant closure.
REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: TRANSPORT BUSINESS)

A worker tries to fix a Peugeot engine at a car scrap yard in the central Bosnian town of Zenica August 15, 2012. Europe's second-largest car maker posted a 662 million euro ($800 million) first-half loss in its auto division, dragging its group bottom line into the red - as it had warned earlier this month when announcing 8,000 French job cuts and a plant closure. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: TRANSPORT BUSINESS)

A worker tries to fix a Peugeot engine at a car scrap yard in the central Bosnian town of Zenica August 15, 2012. Europe's second-largest car maker posted a 662 million euro ($816 million) first-half loss in its auto division, dragging its group bottom line into the red - as it had warned earlier this month when announcing 8,000 French job cuts and a plant closure. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: TRANSPORT BUSINESS)

Supporters of India's main opposition Hindu nationalist Bharatiya Janata Party (BJP) run towards a train engine to block its way during a protest against a hike in petrol prices in the western Indian city of Ahmedabad May 31, 2012. REUTERS/Amit Dave (INDIA - Tags: CIVIL UNREST POLITICS ENERGY BUSINESS)

A fuel nozzle is seen at a gas station in Berlin April 3, 2012. REUTERS/Tobias Schwarz (GERMANY - Tags: TRANSPORT SOCIETY ENERGY BUSINESS)

A man rides a bicycle fitted with a petrol engine beside a mural of doves painted with Cuban flags and an image of the city in Havana January 29, 2012. Cuba's Communist Party will consider reforms this weekend that could impose term limits on its leaders in what would be a striking change on an island that Fidel Castro ruled for 49 years and was succeeded by his brother. President Raul Castro said in an April Communist Party congress that this conference, which started on Saturday and is the first in the party's history, would consider limiting Cuban leaders to two five-year terms. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY POLITICS TRANSPORT)

A picture shows a sign advising customers to check whether the new E10 fuel is suitable for the engine of their car before purchase at a petrol station in Berlin, March 4, 2011. Berlin demanded clarity on Thursday over the gradual introduction of gasoline with a higher than normal biofuel content after the industry's association sent mixed messages on whether the phase-in would be halted. The writing reads: "Super E10! Contains up to 10% of bio-ethanol. You must check whether the fuel is suitable for your engine!" REUTERS/Thomas Peter (GERMANY - Tags: ENERGY)

Visitors and Media walk past a Subaru concept car displayed during the first media day of the 81st Geneva International Motor Show at the Palexpo in Geneva March 1, 2011. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: TRANSPORT BUSINESS)

An employee of a petrol station is seen between samples of engine oil at a gas station in Tokyo February 25, 2011. Japan's Nikkei average rose on Friday for the first time in four days, as a sharp pullback in oil prices calmed concerns that a recent surge could derail the global recovery and nudged investors back towards riskier assets. REUTERS/Toru Hanai (JAPAN - Tags: ENERGY BUSINESS)

A model poses with the new Volkswagen's "Vento" during its launch in New Delhi July 6, 2010. The Vento will be available in both petrol and diesel variant for the Indian market with a 1.6 litre engine. REUTERS/B Mathur (INDIA - Tags: TRANSPORT BUSINESS)

The new Volkswagen's "Vento" car hangs on display from a building during its launch in New Delhi July 6, 2010. The Vento will be available in both petrol and diesel variant for the Indian market with a 1.6 litre engine. REUTERS/B Mathur (INDIA - Tags: TRANSPORT BUSINESS)

Director of Volkswagen Passenger Cars and Group Sales India Neeraj Garg stands next to the new Volkswagen's "Vento" during its launch in New Delhi July 6, 2010. The Vento will be available in both petrol and diesel variant for the Indian market with a 1.6 litre engine. REUTERS/B Mathur (INDIA - Tags: TRANSPORT BUSINESS)

A man rides his bicycle fitted with a petrol engine in Havana January 30, 2010. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY TRANSPORT)

A man pushes his bicycle fitted with a petrol engine in Havana January 30, 2010. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY TRANSPORT)

Toyota Motor's logo is seen on an engine at a showroom in Tokyo January 22, 2010. Toyota Motor Corp said on Thursday it will recall millions more vehicles in the United States, its second massive recall in four months, this time to fix potentially faulty accelerator pedals. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: TRANSPORT BUSINESS)

An African Union (AU) fire engine arrives to extinguish a fire at a burning petrol station in Somalia's capital Mogadishu December 19, 2009. The cause of the fire was not established. REUTERS/Feisal Omar (SOMALIA - Tags: DISASTER)

A Toyota automaker employee moves an engine at the Toyota engine assembly line in Huntsville, Alabama November 13, 2009. REUTERS/Carlos Barria (UNITED STATES TRANSPORT BUSINESS)

Teams of engineers and aspiring engineers participate in the annual Honda "Eco-Run" competition in Motegi, north of Tokyo, October 11, 2009. In the event, contenders design vehicles powered by a four-stroke 50cc engine, driving them seven laps around a track for a total 16.8 km (10.4 miles) using as little fuel as possible. Apart from a few regulations on the vehicle's dimensions -- they must measure under 3.5 metres (12 ft) long and have at least three wheels, for instance -- the rules are simple: cover the designated distance in under 39 minutes and 20 seconds, equivalent to a minimum speed of 25 km (15.5 miles) an hour. The mileage is calculated based on the amount of petrol consumed. The record so far is a mind-boggling 3,435 km/litre (8,080 miles per gallon), set in 2001. Picture taken October 11, 2009. To match Reuters Life! AUTOS/GREEN RACE REUTERS/Chang-Ran Kim (JAPAN TRANSPORT ENVIRONMENT SOCIETY)

Teams of engineers and aspiring engineers participate in the annual Honda "Eco-Run" competition in Motegi, north of Tokyo, October 11, 2009. In the event, contenders design vehicles powered by a four-stroke 50cc engine, driving them seven laps around a track for a total 16.8 km (10.4 miles) using as little fuel as possible. Apart from a few regulations on the vehicle's dimensions -- they must measure under 3.5 metres (12 ft) long and have at least three wheels, for instance -- the rules are simple: cover the designated distance in under 39 minutes and 20 seconds, equivalent to a minimum speed of 25 km (15.5 miles) an hour. The mileage is calculated based on the amount of petrol consumed. The record so far is a mind-boggling 3,435 km/litre (8,080 miles per gallon), set in 2001. Picture taken October 11, 2009. To match To match Reuters Life! AUTOS/GREEN RACE REUTERS/Chang-Ran Kim (JAPAN TRANSPORT ENVIRONMENT SOCIETY)

The engine of a new Ferrari 458 Italia is pictured during the first media day at the international car show "IAA" in Frankfurt September 15, 2009. The world's biggest auto show starts with its media days on September 15 and will run until September 27. REUTERS/Ralph Orlowski (GERMANY TRANSPORT BUSINESS)

The engine of a yellow Lamborghini Gallardo is seen at Australia's Supercar Club in Sydney August 13, 2009. Australia's Supercar Club, which makes luxury cars available to a pool of members, is drawing new clients every month who would rather borrow an Aston Martin or a Lamborghini on the weekend to release their inner James Bond than own one. Picture taken on August 13, 2009. REUTERS/Daniel Munoz (AUSTRALIA TRANSPORT SOCIETY BUSINESS)

Managing Director of Maruti Suzuki Shinzo Nakanishi speaks to the media inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki on Tuesday launched a new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

Employees work inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki, India's top car maker, on Tuesday launched the new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

An employee works inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki on Tuesday launched a new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

Employees work inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki on Tuesday launched a new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

Employees work inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki on Tuesday launched a new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

Employees work inside Maruti Suzuki's newly launched petrol engine plant on the outskirts of New Delhi October 21, 2008. Maruti Suzuki on Tuesday launched a new plant that will have annual installed capacity to produce 240,000 fuel-efficient petrol engines. REUTERS/Vijay Mathur (INDIA)

National councillor Bastien Girod (C) carry boxes with signatures of the initiative "Offroader"outside the parliament building in Bern August 25, 2008. Citizens are due to vote on an initiative that plans to ban the sale or purchase of vehicles with large engines, high petrol consumption and high emission of Co2 in Switzerland. REUTERS/Stefan Wermuth (SWITZERLAND)

A man on a bicycle holds a flag protesting against off-road cars, in front of the parliament building in Bern August 25, 2008. Citizens are due to vote on an initiative that plans to ban the sale or purchase of vehicles with large engines, high petrol consumption and high emission of Co2 in Switzerland. REUTERS/Stefan Wermuth (SWITZERLAND)

A man on a bicycle holds a flag protesting against off-road cars, in front of the parliament building in Bern August 25, 2008. Citizens are due to vote on an initiative that plans to ban the sale or purchase of vehicles with large engines, high petrol consumption and high emission of Co2 in Switzerland. REUTERS/Stefan Wermuth (SWITZERLAND)

People stand next to a car with a banner protesting against off-road cars, in Bern August 25, 2008. Citizens are due to vote on an initiative that plans to ban the sale or purchase of vehicles with large engines, high petrol consumption and high emission of Co2 in Switzerland. REUTERS/Stefan Wermuth (SWITZERLAND)

A Continental Bentley is pictured on the Mont-Blanc bridge in Geneva August 5, 2008. Citizens will vote on an initiative that plans to ban the sale or purchase of vehicles with big engines, high petrol consumption and high emission of Co2 according to local newspaper. REUTERS/Denis Balibouse (SWITZERLAND)

A Ferrari is pictured on the Mont-Blanc bridge in Geneva August 5, 2008. Citizens will vote on an initiative that plans to ban the sale or purchase of vehicles with big engines, high petrol consumption and high emission of Co2 according to local newspaper. REUTERS/Denis Balibouse (SWITZERLAND)

A Range Rover (R) is pictured on the Mont-Blanc bridge in Geneva August 5, 2008. Citizens will vote on an initiative that plans to ban the sale or purchase of vehicles with big engines, high petrol consumption and high emission of Co2 according to local newspaper. REUTERS/Denis Balibouse (SWITZERLAND)

A visitor looks at motorcycle fuel tanks on display during the grand opening of the Harley-Davidson Museum in Milwaukee, July 12, 2008, showcasing more than a century of the company's history that began in Milwaukee in 1903. Harley-Davidson Inc said on Friday it would buy privately held Italian motorcycle maker MV Agusta Group for 25 million euros ($39 million), sending its shares down 4 percent. REUTERS/Finbarr O'Reilly (UNITED STATES)

A motorcycle and parts are shown on a display during the grand opening of the Harley-Davidson Museum in Milwaukee, July 12, 2008, showcasing more than a century of the company's history that began in Milwaukee in 1903. Harley-Davidson Inc said on Friday it would buy privately held Italian motorcycle maker MV Agusta Group for 25 million euros ($39 million), sending its shares down 4 percent. REUTERS/Finbarr O'Reilly (UNITED STATES)

Motorcycle fuel tanks are exhibited on a wall during the grand opening of the Harley-Davidson Museum in Milwaukee, July 12, 2008, showcasing more than a century of the company's history that began in Milwaukee in 1903. Harley-Davidson Inc said on Friday it would buy privately held Italian motorcycle maker MV Agusta Group for 25 million euros ($39 million), sending its shares down 4 percent. REUTERS/Finbarr O'Reilly (UNITED STATES)

Palestinian electrical engineer Fayez Anan (L) stands near an electric car in Gaza May 20, 2008. A Palestinian-designed electric car drew admiring stares on Tuesday from Gazans forced to use cooking oil to power their cars because of a fuel shortage. Anan and fellow electrical engineer Wasim al-Khuzundar, hooked up an engine to 32 batteries. Driving their small car through the streets of Gaza City, they said the vehicle could travel up to 200 km (120 miles) on a single charge. REUTERS/Mohammed Salem (GAZA)

A Palestinian boy looks at a mechanic convert a car to run on cooking gas from petroleum because of a fuel crisis in the Gaza Strip April 14, 2008. Israel accuses Hamas of preventing distribution of fuel in order to create a crisis to pressure Israel to ease its blockade of the territory. REUTERS/Ibraheem Abu Mustafa (GAZA)

A ground staff member stands beside a fuel attachment to a Qantas plane at Sydney airport February 21, 2008. Qantas Airways Ltd, Australia's biggest airline, beat market estimates with a doubling in first-half profit and forecast at least 40 percent rise in full-year earnings, buoying its shares. REUTERS/Tim Wimborne (AUSTRALIA)

A worker puts petrol into a portable generator at a construction site in Beijing November 15, 2007. China's Premier Wen Jiabao called on refiners to ensure fuel supplies as drivers faced queues and rationing on Wednesday, despite a recent price hike aimed at pushing oil firms to boost flows of products. REUTERS/Claro Cortes IV (CHINA)

Eight-year-old Gudia, an oil scavenger, walks back after collecting engine oil at an auto workshop in Jammu November 13, 2007. The government said on Tuesday it would not raise prices of petrol and diesel for now as the government is compensating retailers for selling cheap fuel at a time when global crude prices have soared, and it had to protect the poor. REUTERS/Amit Gupta (INDIAN-ADMINISTERED KASHMIR)