I got a free bottle of ProLong fuel treatment and Engine/Oil cleaner treatment. My buddy had one and simply let me put it in my car.<BR><BR>Did I notice a difference? I don't know. Temp was the same, ...

Let’s talk about fuel additives. You’ve probably seen them lined up on store shelves, promising to boost your car’s performance, clean your engine, or even improve your gas mileage. They’re like the ...

Pretty simple question actually (or so my ignorant mind thinks): At what compression ratio would an engine benefit from higher octane fuel? The Focus I drive is just over 10:1, and I've heard some say ...