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I am still a little tentative about the seafoam. I mean, I have read 95% positive reviews about it. But, I still have this fear of screwing with an old engine (1991 244 113000 miles) and dislodging something, or clogging the cat. But, I have decided that I can't live with the crap gas mileage that I am getting. I also have a slight rough idle that is driving me nuts. I just hope I don't screw up my engine.
I have decided only to use it in the gas tank, and sucking it in through a vacuum line into the intake. I have also decided to just drive the car pretty hard after it sets for 20 minutes or so, and not rev the guts out of it with no load on the engine.
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