yes auto tranny fluid. i used it once in a old car i used to have. just to see if it worked. it worked alright. alittle to well. after that. i had oil leak threw the valve seals. so i ended up with blowing blue smoke on start up. but the insides was cleaner :P i drained my oil. changed the filter. added a full liter of ATF and top it off with thinner oil. 5w30. ran it like that for a day or to. or roughly 50-100kms. changed the oil to what the manual said. 10w40. and new filter. then your good to go. that was on an old geo metro i had.
Posts: 324 From: Lewiston, Maine, USA Registered: Mar 2007
I owned a 91 Jeep Wrangler with a Iron Duke in it. It had 192k on it when I put Seafoam in the block. Now this was my first time using it and as I read it, you ad it to your oil and then drive it. I drove it 50 miles to and 50 miles from work. (I know) 100 miles on Seafoam treated oil. Well, just before the ride home I read that treated oil should be drained and replaced after running for 15minutes or so. I have driven the Jeep for 2 hours total. Well I drained the oil and changed it and believe me, the upper head was CLEAN and it seems to feel better. I then did the Seafoam through the upper valve train. It just seems to run smoother and free up a little more power.
Ever since that first treatment, I have used it in all my old engines. EXCEPT my Infiniti G35. On the G35 it is known to destroy the Cam sensors and make the car run aweful until the $50 sensor is replaced. So word of advice, don't use in car with Cam sensors.
But the Seafoam is where it's at. Love the stuff for old engines.
------------------ 86 Fiero 2M4 Silver, and 86 GT
Posts: 80 From: Cleveland, Ohio Registered: Jun 2010
Another vote for SeaFoam. I always liked the fact that you can pretty much pour it anywhere in your car and it will do something good! I use it in my Fiero with 148,xxx miles and my Cherokee with 183,xxx miles and everything remains nice and clean (NOTE: I have put new seals in the Fiero and Cherokee motors... not sure what leaks it would have caused had I not done that). I also used it in an '88 Wrangler I used to have right into the carburetor, and I definatly noticed a difference in how well it ran after that treatment (lots of smoke though...).
Posts: 41056 From: Southern MN Registered: May 2007