Im gonna sell the Accord for an Insight! I cant even drive my Accord these days cause of gas prices...(and Im turbo too...)

 

yeah falk is right; the higher compression the higher the octane, which means the higher concentrations of heptane.

heptane's boiling level (or in our case combustion level) is about 35% less than that of iso-octanes found in our fuel; hence you get worse gas mileage... it's not because your car uses more or anything else someone might state.

i haven't researched too much on the flex fuel; but i'm not buying into that yet anyway...


now... does anyone have any arguments over the "brand" of gas you buy? ie, Chevron vs RaceTrack vs 7-11, etc?

I mostly buy from RaceTrack, seems to be a stable fuel source at decent prices.

 

I have always liked the way Exxon made my car run

 

^^^ My grandfather owned an Esso station and gave my mother and her sisters Texaco cards when the Esso would have been free to them. Food for thought.

 

Gasoline sources are local or regional.Brand XYZstations in California get gas from one refinery or terminal, while the same brand stations in Ohio get it from somewhere else.

Blending is different around the country, especially in winter. There's abunch ofdifferentwinter-blend gasolines around, and probably different blends in summer too.

My personal guess is the really big names like Shell, Mobil, BP are probably pretty consistant across the country. Smaller brands may be OK here but not OK there. Are you confused yet?

And anti-knock requirements ('octane') are more complicated than just compression ratio.

 

Why does this give me the feeling that we are about to get a lesson on this from professor JohnL? LOL