My S52 did amazing on gas. I could regularly get 700-800 on a tank. The S54 definitely drinks more but not by much. The best I've done is 500 mixed highway/city. I know if you really try the S54 can get close to 800. I'll do a valve adjustment and spark plugs which should help out quite a bit.
Quote:
Originally Posted by SiR
solid mounts ftw(re: honda rattles and vibration)
Id open that thing up already  sounds like a nicely done swap. reliability is key.
what is the gas mileage like with an s54?
s52 is half decent imo even by todays standards.
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