Hello, ALL.

Our 'family' car here is this older Buick sedan - a '98 LeSabre. Engine
is the GM 3.8L V6. (I've had several cars with this block over the
years, with generally good service).  IMO it gets decent gas mileage on
the recommended 87 octane. I bought gas here last week at Costco, and it
was 2.03 for 87 and 2.13 for the 91 octane. (A bit less than 5% price
premium). This is unlike a lot of the commercial gas sellers, where the
high-test is typically $0.20 or so more than the regular.

I don't take many long trips, mostly local but not much stop and go
in heavy traffic. I was thinking if I'm averaging 20mpg now, and could
get 21.0 or better with the higher octane with my type driving of it,
I'd be doing OK.

I'm surprised I haven't seen any articles about this situation. My
question- might I be able to get more than 5% mileage increase if I
start running the high-test?

- - -  JimH.

... "Inquiring minds want to know." - - Bubba
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