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Re: Octane Myth
With modern Audi engines being equipped with knock sensors the timing
can be retarded to accomodate lower octane fuel fuel (87 RON). My
1993 100cstqw requires premium fuel according to the owners manual.
I have been running 89 octane grade without any appreciable
difference in performance. I dont think there is any danger of
damaging the engine but, I think there may be a difference in fuel
economy. I have only owned this car sine August so I haven't done
a comprehensive comparison of octane vs. fuel economy.
The Audi technician at the local dealer recommends 89(RON) but do not
go below this for fuel economy reasons. I wonder though if the much
higher cost of premium generates enough of a gain in fuel economy to
offset the higher cost?
79 BMW 320i
88 Honda Civic
93 Audi 100CSTQW