Quote:
Originally Posted by BuckarooBanzai
Zonker's on point here, and the Seafoam bottle itself states it's "not to be used on vehicles with over 150,000 miles."
However, it's not definitive. Here's a link I've bookmarked with compression tests before and after seafoaming a civic
at 198,000 miles, I'm hesitant too!
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In the link you posted, the Original Poster's math is wrong. After the seafoam treatment there is a 20psi difference between cylinders: 195-175 = 20psi. (as opposed to the 27psi difference before seafoam).
Just wanted to point that out.