Is supermarket petrol bad for my car? [more inside]
posted by Lorc on Aug 30, 2009 - 14 answers

If we lowered the speed limit nationally to 55mph, how much fuel would we save? [more inside]
posted by mikeyk on Oct 13, 2008 - 31 answers

What's 95 octane gas and where do I buy it? [more inside]
posted by rileyray3000 on Sep 15, 2008 - 25 answers

Would it be absolutely ludicrous to look into buying a car that takes premium fuel in this day and age? [more inside]
posted by decrescendo on Jun 15, 2008 - 55 answers

From Thursday-Saturday, I'll be moving from Eau Claire, WI to Mesa, AZ. I have to drive. Money-saving tips? [more inside]
posted by charmston on May 11, 2008 - 13 answers

Is it true that it is good for a car to fill it up with higher grade gas once in a while? I usually fill up at Shell, and there is 87, 89 and 91 kinds of gas, with 87 being the cheapeast and 91 being the most expensive. I usually get 87. However, I heard that if you own a car and want it to last longer, it is beneficial to fill it up with the most expensive gas, to "clean the engine". Is that true? If so, what is the explanation behind it? I drive a 2002 Kia Rio, if that makes any difference.
posted by esolo on Dec 22, 2007 - 22 answers

My friend says the fuel injection in my 2002 Jetta wagon (non-diesel) suffers if I let the tank get less than 1/4 full. She also believes that "el cheapo" gasoline, from locally-owned non-chain stations, isn't as good, or is actively bad, for the car. Is there any truth to either of these claims?
posted by luriete on Dec 7, 2007 - 29 answers

Is "brand" gas - like Chevron with Techron - worth the extra 10-15 cents/gallon?
posted by joshuaconner on Jul 12, 2007 - 26 answers

In three cars I've driven, I get about 300 miles per tank of gas. But with all three cars, I can get up to 200 miles by the time I hit 1/2 tank. But invariably, by the time I near the 300 mile mark, I'm on E. Am I nuts or do gas seem to burn faster in the lower 1/2 of my tank? Is this mental or by design? [more inside]
posted by mathowie on Apr 7, 2007 - 22 answers

I spilled a bunch of gas in my car. The smell--apparently--does not dissipate even with the windows rolled down. Any ideas?
posted by mwachs on Jan 29, 2007 - 7 answers

Why have the gas prices fallen rapidly in the last few weeks? [more inside]
posted by aeighty on Sep 20, 2006 - 28 answers

In the late 70s or early 80s, I watched a movie, probably on network television, which was called something like, "The Last V8" or "The Last of the V8s". Help me find it! [more inside]
posted by tomierna on Aug 12, 2006 - 7 answers

All about gasoline. [more inside]
posted by grateful on Apr 26, 2006 - 26 answers

I was on a road trip recently, and we fell to wondering whether the car uses gas faster when full or nearly empty. My friend said one thing, I had heard another, and harbor a suspicion that it's all urban myth anyway. Any ideas?
posted by kaibutsu on Jul 14, 2004 - 21 answers