Well, I did this 2 times to my Stratus last year. The first time, I didn't do it exactly right. Not getting the entire can in and having this take place at night. The 2nd time, it was during the day and I let it stay in longer, more like nearly 2 hours. Afterward, I cranked it up and while in park held the RPMs at around 2,000-2,500, perhaps for a minute or 2. Then, my friend and I proceeded to idle to the red-light out of the complex. As soon as the light turned green WOT and a plume of smoke.
The more I think about it, I believe American cars have more room above the cylinder heads compared to Japanese. This would obviously allow more space for carbon and what not to start building. I'd imagine this type of product in the long run wouldn't really help my VX as much as it helped my Stratus. No problems with the Stratus either. It will throw a CEL, but clear the code and it won't come back. Didn't foul any plugs, either.
Good idea in regards to the test pipe as well. The stuff must be 'safe enough' because the manufacturer uses Mopar CCC to tune up their cars, even ones under warranty. I know they don't use SeaFoam over their own product as far as Chrysler/Dodge/Jeep is concerned.
I strictly use half a can of SeaFoam in my gas tank once at every oil change(not a strong mixture though, maybe mostly full tank) and the other half in my crankcase within 100-150(max) miles of changing my oil. I'm only using it in the crankcase now b/c its always had conventional put into it, at least for a good stretch, before I owned the car. I'm hoping to drop the oil pan and see what gunk was taken to the bottom. That way, once I go to a full synthetic it won't start breaking down the sludge at the bottom of the pan and risk cycling it through the engine, after cleaning it off. Technically, you're supposed to do this every time you SeaFoam the crankcase.
I'm just going to buy the rubber replacement gasket for the oil pan, drop it after my next change and clean it out.
__________________
'92 Civic VX, Canadian model
|