Back in 2004, several automakers got together to create a more pure form of gasoline to meet strict standards set by the U.S. Environmental Protection Agency (EPA), now known as Top Tier gasoline.
CAR Magazine on MSN
The best petrol injector cleaners to maintain engine longevity
Fuel system issues can be expensive, so it makes sense to invest in a petrol injector cleaner next time you fill your car up.
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