With all the different engine and combustion theories being tested at the Engine Masters Challenge, it made us wonder about the fuel these powerplants were gulping down. For the 2015 event, we had ...

Some new cars claim to require premium fuel, others recommend it and most new vehicles on the road today are perfectly happy with regular fuel with nary a hiccup. Simultaneously, we're bombarded by ...

Q: I drive a 2001 Lexus LS430 with 58,567 miles. The car manual says I should use gasoline with an octane of 96 or higher. I cannot find an octane that high. Any suggestions? — J.S., Fort Lauderdale, ...

Filthy myths run rampant when it comes to understanding race gas. Some say that the higher the octane the slower the burn rate. Others claim that too much octane reduces horsepower. Unfortunately, ...

At gas stations around the world, premium 98-octane fuel often sits beside regular 91 or 95-octane options, usually at a ...

When you go to a gas station, you are presented with several types of fuel, each labeled according to an octane number. While most cars can do with regular gas (generally 87 octane), it is often ...

Car Care is a twice-monthly series offering maintenance best practices and DIY tips for car owners. You’re not alone in thinking that pumping gas has gotten more confusing. With more fuel options than ...