Originally Posted By: Vikas
How much difference did it make in the driving? Was it substantial? Was the change much more than what you could have got by strong fuel system cleaner and throttle body cleaner only? Also do you have any experience with the Seafoam through intake and if so, how would you compare the results of Seafoam vs 3M?
I purchased the 3M kit last year and I am still saving it for "the rainy day".
- Vikas
I'll preface this by saying that I don't have the well-calibrated butt dyno of others. The car was definitely smoother at idle and accelerating at take-off. It seems that there was about .5-1mpg improvement as well, but given all of the variables, I couldn't swear to it. Of course, I pulled the TB off and cleaned it, then ran the intake cleaner right afterward, so I can't say it was one thing over the other.
I used Seafoam pretty often in my Volvo, since it seems to be a popular Volvo thing to do... I decided to go with the 3M mainly because 1) I wanted to run it in front of the TB and not a vacuum line (I could have done this w/Seafoam, but the 3M is set up to run this way), and 2) I generally trust the 3M stuff. I didn't worry about it with my Volvo, but with a newer car I just figured the cleaner in it would be less likely to cause any issues with any of the stuff downstream (like O2 sensors). Maybe I'm swayed by their reputation, but 3M generally seems to make pretty high-quality solvents, cleaners, adhesives, etc.
It's hard to quantify this stuff, and my intake valves may have looked great anyway, but for $50.00 every 30K, I think I'll keep doing it.