Seafoam before 1 yr. OCI

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EricZoom

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I'm coming up on my 1 yr. OCI using M1EP 5w20 in my 04' Mazda6s, and would like to know if it's a good idea to add a dose of Seafoam, several days before my OCI. Car only has 60k miles on it, but figured it would still help clean out any [censored] that might be in the engine that's due to age. Any suggestions?
Thx.
 
Pass. I used it on my old chevy prizm for the first time. Car ran great for 1 day, then I got multiple egine codes. Turns out my spark plugs got clogged with all the junk that the seafoam dislodged. Had to replace plugs then.

Final result- Car ran just the same as before, no change in idle or mpg. Cost was a few hours or work, a big headache, and about 25 bucks in parts.
 
Seafoam is diesel fuel,light lubricating oil and isopropyl alcohol.Thats all,no miracles there.
 
If you are running mobil synthetic, you don't need to add anything to the oil to clean. If its running fine, not in the gas either. If i were going to add a fuel cleaner, it would be techron.
 
Better to apply good detergent content synthetic oil with shorter OCI in case of neglected, but good oil pressured engine - IMHO.
 
Originally Posted By: FirstNissan
Pass. I used it on my old chevy prizm for the first time. Car ran great for 1 day, then I got multiple egine codes. Turns out my spark plugs got clogged with all the junk that the seafoam dislodged. Had to replace plugs then.


The OP is asking about seafoam in the crank case. How could seafoam damage your spark plugs if it was in the crank case, or was it?

I think you put seafoam in your gas tank. I think it did its job as advertized. When you put seafoam into a gas tank in a high mileage car, you should expect the stuff to be dislodged and your fuel filter get clogged. I wouldn't put it into the gas tank if I wasn't planning to change my fuel filter after that..
 
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Originally Posted By: EricZoom
I guess the consensus is no. Thx everyone.



I wouldn't say that the consensus is pass. 5 replies is not statistically significant IMO. Perhaps seafoam users post on different time of day ;p It does have a good following.

I personally have put seafoam into gas tank, crankcase, and directly through vacuum hoses with no ill effects. Yes, if the car is _really_ old with many deposits you should not keep seafoam in your oil for long. To be save, just run 10 miles or so with seafoam is added to oil, let it sit, and then change oil. However, personally I'd pass unless the thing is on sale. $8 for a can seems steep. I usually wait until some stores has a "buy one, get one free" promotion.
 
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