> The reddish color of pump gas is due to a dye additive to make gasoline
> more visible. I suspect a heavy dilution with fresh gas would dissolve
> this varnish, given enough time. There are stabilizer that can be added
> to gasoline to reduce this problem for cars, boats or whatever that
> aren't used very often. However, I'm told these stabilizers contain
> alcohol which could be a problem for the rubber seals in the fuel
> systems of older cars.
>
> Roland
The color of the gasoline also determines the grade. Red is the lowest
grade (80-100 octane). Blue is next (100-110?). I think that is followed
by green?
-mark
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