Well, I've done MMO through my PCV valve before. Lots of smoke, but hard to say if it did any substantial cleaning but heck, MMO is cheap, give it a go and put some in your gas tank too.
I started using MMO recently in my Tundra gas tank according to the instructions on the bottle. It has significantly quieted the fuel injectors on my 134K mile V-8 engine. I'm impressed. I hope it doesn't have a similar propensity to leach lead from my bearings like Techron fuel additive did though.
This is the last UOA on my Tundra. I will be doing another one this winter, after a couple of fills of Schaeffer's 7000 10W30. I will use Dyson Analysis for the next UOA.
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I started using MMO recently in my Tundra gas tank according to the instructions on the bottle. It has significantly quieted the fuel injectors on my 134K mile V-8 engine. I'm impressed. I hope it doesn't have a similar propensity to leach lead from my bearings like Techron fuel additive did though.