[wc76]

Just thought I'd share a recent tidbit. First, a little background...about 1.5 years ago I was putting exclusively Chevron high octane in my Berlina and my average fuel economy was in the 24-26 mpg range for about 60/40(highway/city) driving. About 9 months ago a mechanic friend of mine told me I need to switch over to 76 as the addatives are better for the engine (this is California gas) so I switched to their high octane gas. When I tracked it I noticed my economy had dropped to the 22 to 23 mpg for the same type of driving. I attributed it winter driving, running rich, etc. About two weeks ago I didn't have the 76 choice and went back Chevron...24.5 mpg (bit more city driving). Hmmm...ok, after two tanks of 76...22.6 mpg for 70/30 driving. Today after two tanks of Chevron and the same 70/30...26.0 mpg. Maybe I'm missing a variable here, but on the surface it sure seems to indicate Chevron has the upper hand in the economy arena.