My car has 128K miles.
As many have recommended, I put 1/3 of the container (pint) in a cup and slowly sucked it with the hose that attaches to the fuel pressure regulator while the engine was revving @ 2K. After it was all sucked up, I immediately shut off the engine, which actually still sputtered for about 10 seconds after the ignition was off. That was kind of scary. Of course I then put the FPR hose back to where it belonged.
While the Seafoam was simmering in there, I added 1/3 of the case to the gas tank (which is just over 1/2 full, so about 9 gallons), and then another 1/3 of Seafoam to the crankcase (which has Mobil 1 15w-50). After 30 minutes, I turned on the engine and revved the engine. Lots of white smoke, but not as much as I've seen from other people's cars in other forums (Audi, Mustang, Camaro). After the smoke was mostly gone, I took the car on a 10 minute spirited drive during which I revved the engine to like 4500-5K before shifting.
I don't notice any difference. Some people have noted that the engine idles a bit smoother, accelerates better, runs quieter... I don't think I got any of that. I wonder if some of those users were just imagining this change (placebo effect), but seems like EVERYBODY noticed it, except me. My car was already pretty smooth at idle (not perfect, though), and the car will vibrate a little when I'm sitting at a red light. It's subtle and not really that big a deal, and that hasn't gone away (not that I care). Accleration is pretty much the same. No sudden boost of power. The only thing I'd be interested to know is if my fuel economy improves (hopefully).
To those of you who have used Seafoam in the past and noted improvements, did this last over the next several weeks/months, or did it go back to the way it was in a couple days? Did your fuel mileage improve?
As many have recommended, I put 1/3 of the container (pint) in a cup and slowly sucked it with the hose that attaches to the fuel pressure regulator while the engine was revving @ 2K. After it was all sucked up, I immediately shut off the engine, which actually still sputtered for about 10 seconds after the ignition was off. That was kind of scary. Of course I then put the FPR hose back to where it belonged.
While the Seafoam was simmering in there, I added 1/3 of the case to the gas tank (which is just over 1/2 full, so about 9 gallons), and then another 1/3 of Seafoam to the crankcase (which has Mobil 1 15w-50). After 30 minutes, I turned on the engine and revved the engine. Lots of white smoke, but not as much as I've seen from other people's cars in other forums (Audi, Mustang, Camaro). After the smoke was mostly gone, I took the car on a 10 minute spirited drive during which I revved the engine to like 4500-5K before shifting.
I don't notice any difference. Some people have noted that the engine idles a bit smoother, accelerates better, runs quieter... I don't think I got any of that. I wonder if some of those users were just imagining this change (placebo effect), but seems like EVERYBODY noticed it, except me. My car was already pretty smooth at idle (not perfect, though), and the car will vibrate a little when I'm sitting at a red light. It's subtle and not really that big a deal, and that hasn't gone away (not that I care). Accleration is pretty much the same. No sudden boost of power. The only thing I'd be interested to know is if my fuel economy improves (hopefully).
To those of you who have used Seafoam in the past and noted improvements, did this last over the next several weeks/months, or did it go back to the way it was in a couple days? Did your fuel mileage improve?
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