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It started in 1969 but really took effect in 1974. More on this subject can be found at: http://www.unep.org/pcfv/pdf/VSR-FinalDraft.pdf Type your answer here...

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Q: What year did US cars convert to unleaded gas?
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Can you convert diesel fuel to regular unleaded gas?

No


When did unleaded gas cars start being made?

In the USA, 1975.


Can you use regular unleaded gas in a BMW and Mercedes car?

Yes. You may not get the same performance (horsepower) as you would with premium gas, but modern cars can run fine on any grade of unleaded gas.


Can super unleaded gas be run in cars designed for regular gas?

Yes you can. Super unleaded gas is just lower in lead so it will not leave as much residue in the system thus giving better gas mileage.


Which gives better mileage unleaded gasoline or premium gasoline?

The best gas mileage from unleaded gasoline or premium gasoline depends on the car. Old cars get better mileage from unleaded.


When was unleaded gas mandated for all cars?

In UK, all new cars from 1992 had to have a catalytic converter fitted, which required a strict diet of unleaded fuel. Many had 'cats' fitted as standard well before then.


What type of gas does a lamborghini need?

According to the link below these four cars require premium unleaded fuel.


What kind of gas does BMW take?

Most BMW Cars Take Unleaded Or For Some Special Ones Diesel.


What does incorrect fuel mean?

all cars today run on unleaded gasoline. however older cars(60's -70's) some ran on leaded or unleaded. even so , some cars today cannot run on regular gas which has a lower octane rating. some need to run on premium gas , which has a higher octane rating.....


What happen to engine with diesel gas that is suppose to be unleaded gas?

When I STOP AT A STATION i GOT UNLEADED GAS BUT FOUND OUT DIESEL GAS WAS MIXED IN WHAT WILL HAPPEN TO MY UNLEADED TRUCK


What is the difference between unleaded and leaded gas?

leaded gas has lead in it, unleaded does not Leaded petrol (or gas as you Americans quaintly call it) contained a chemical called Lead Tetraethyl to improve its performance. It was then discovered that the amount of lead given out by cars (or automobiles) was making city air dangerous to breathe and so its use has been forbidden. All petrol/gas is now unleaded and "green". Car engines have needed to be redesigned to allow them to burn the unleaded fuel.


Mixing unleaded and super unleaded gas is it good?

There is no risk in mixing super unleaded gas and regular unleaded gas. Super is just given to the name of a gasoline because of cleaning agents and octane added to the gas not because the gas is completely different.