Do you think premium gas is free of ethanol and the best choice for small engines? Do you ever treat your car to an ...

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Over time and miles, your car might start to slow down. It might not accelerate as quickly as it once did; the engine ...

Researchers in Southern Illinois University Carbondale’s School of Aviation could help spur the adoption of an unleaded fuel ...

Putting high-octane gas in a car or motorcycle that doesn't need it won't hurt the engine, per se. The fuel will still function the same way regular fuel would without causing any ill effects. But ...

Premium E10 unleaded fuel is often sold alongside standard E5 unleaded at most petrol stations. Premium fuel contains a higher octane rating but is often more expensive to use than the regular pump.

Standard fuel typically comes with an octane rating of 87-94, but high-performance racecar engines require a higher octane rating, up to 120 or even higher, to maximize power and withstand greater ...

In summary, if your engine — small-block Chevy or otherwise — is crying out for higher octane fuel, E85 is certainly an option to pricey race gas, but be sure to factor in the upfront cost and ...

Octane numbers, ethanol content and diesel get thrown in the mix, while TV commercials shout about special cleaning additives and better fuel economy. What’s a motorist to do?