Lots of the engines are not 9 to 1, but are designed to be run on 87 octane.
except the foriegn cars.
all mine run fine on 87 and the knock sensor works if they don't.
Besides, the lower price offsets any little problem.
BUY AMERICAN or you are part of the problem.
You wrote on Tue, 10 Jan 2006 01:41:05 GMT:
T> Bill wrote:
??>> By using higher octane is just a bunch of B.S,unless you have a
??>> higher compression engine. I used 92 in my 97' Z71 several times,in
??>> several states,and it did nothing. I have gotten 20+ mpg on 87.
T> The BS is beliving you do not need it. You do not now what your are
T> missing until you run a few tanks of it because 87 was designed for 8 to
T> 1 CR in the 70's and 80's not today 9 to 1 plus engine. If it was such a
T> great gas, modern engine would not have knock sensors to control
T> consumer complaints. Plug a realtime monitor into your OBDII port and
T> watch the timing and see the difference between 87 and 91.
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