> How much would a valve adjustement improve gas milleage on a 11 year old
> Acura ?
Not so you'd notice.
> Is it even worth it?
For sure, if it hasn't been done in a while.
> I don't hear much of a valve train noise,
Do you really know what valve noise sounds like?
> so the adjustement must be ok?
Not necessarily.
1) If the clearances open up you'll get a tappety noise.]
2) If the clearances CLOSE up, you won't get any noise, but the valves risk
getting burned, a very expensive repair.

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The Unofficial Honda/Acura FAQ
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