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Re: What Gas to use?

Greg Wolters writes:
> Sorry I forgot to mention what type of Audi I was talking about... (I
> hate it when listers do that!)
> I have a 86 4K CS Quattro (5 cylinder engine of course!)
> Are you saying that my car will adjust to the octane I'm using to
> prevent knocking at the expense of lower performance?  What about
> overall engine well being... is it best to use higher octane gas?

Your 4KQ has a medium compression engine and does not have knock sensors,
so you do not lose performance by using 87 octane gas.  However, premium
gas typically also contain certain fuel additives that may be beneficial
in keeping injectors clean and prevent carbon buildup on valves.
For example, Chevron's Techron.

96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
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