Quote:
Originally Posted by birdmedic
Yeah I figured that its snake oil. Im returning the seafoam and going full synthetic...
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I don't understand the second part. Were you going to add the seafoam to the oil? Most folks use it in the fuel tank: it probably wouldn't hurt & may do some good, just as any fuel system cleaner should.
As to the rough idle, does the car have some type of idle air control valve or bypass? If so, maybe it's clogged & needs to be replaced. You might be able to verify by cleaning it prior to replacing to see if it has any impact on the idle. Install a new gasket.