Oil flushing, cons?

[Dirtman]

I've used seafom a couple times. If you do it as per the instructions your only adding 5 ounces. Cant see that being harmful... or really all that beneficial. On old crap engines with a million miles I always ran a quart of kerosene, idled for 15 minutes with a already hot engine and then drain. Definitely a noticeable difference in how nasty the oil was before and after the kerosene cycled through. But to be honest, I'd never do that on an engine I wasnt trying to tune up to sell, or was on its last leg and just trying to keep it running. Anything else... 5 ounces of seafoam. May be snake oil (for the crankcase, I definitely believe in it for the fuel system and intake) but definitely not hurting anything.

 

[Shran]

I had an Explorer earlier this year that was really destined for the junkyard and had probably the worst lifter tick I've heard. Having nothing to lose, I figured I'd try an old trick I heard about - dumping a cup or more of diesel fuel into the oil and letting it run. I think I put about a quart in, fired it up, and let it run for a half hour while I put tools away.

After that the lifter tick was not totally gone, it would occasionally come and go at idle, but 100% improvement at anything over idle. HUGE difference.

I would probably not run it long term, or on a regular basis, but in this one instance it definitely helped.

 

[chewy012]

A lotta good stuff here guys, thanks for everyone's 0.02.... I think we've all got another bucks worth outta this thread. Thanks!

Sent from my VS988 using Tapatalk

 

[kimcrwbr1]

I put a quart of atf in mine and ran it about 50 miles and put in a new filter and run it another 50 miles. Then did a complete oil change. The first filter was full of syrup but the second one drained pretty clean. Be sure and drain some oil out before adding the detergent overfilling coud cause a blowout on a gasket. The only leak i had was in the valleys of the block and heads under the intake manifold. I cleaned the area good then squished some permatex #2 in the valleys so it formed a bead inside like a plug. Been good ever since!