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

FreightTrainFilter: Living near train tracks in Greensboro, NC, I've noticed that there's an increase in the amount of double-stacked trailers that you would normally see being hauled by rigs on the interstate. Is this related simply to fuel costs, or are there other factors at work? [more inside]
posted by lifeofthunder on Mar 2, 2009 - 6 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

What sort of fuel should I use for long-distance cycling events? Yes, there is [more inside]
posted by fixedgear on Oct 23, 2006 - 22 answers