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I like where your head is at! I never even considered that. However, if that were the case I would expect far more threads on the G8 forums about red oil or varnish inside the engine as cam swap's are commonplace with these cars, even if performance isn't the goal. Then again, it is entirely...

GM's AFM or DOD definitely has had its problems. Especially on the G8 platform it is one of the most common problems aside from their problematic LCA's. That being said, it's easy enough to remove the system in its entirety with new lifters, lifter trays, cam, and oil pressure relief valve. Of...

couldn't tell you, it was a random picture taken off this site. I used it primarily for an example. However, to me it looks like a japanese dohc engine to me. I would have guessed ka24de, but its been a while since I've seen the inside of one of those.

Just so I can clear up the theory portion of your post am I reading this correctly? As the engine partially combusts fuel, liquid nitrated and oxygenated monomers will form in the oil. With the monomers present in the oil and exposed to heat they will turn to varnish then eventually sludge if...

I've worked on a few old cars in my time and traditionally when I think of a "filthy" engine I think of black deposits. With my current engine, when I saw it I thought it was dirty but not filthy. After spending some time on this board reading, I am inclined to believe, if its not "filthy" its...

I can't remember exactly which it was but it was a Pennzoil with a gray bottle, bought in 5 qt jugs. I want to say it was Pennzoil Platinum but I can't say for sure until I go check my trunk. That being said I've only used it for less than 1000 miles. The oil life monitor logic just pulled my...

This is good to know, thank you. In addition, in your opinion, bare minimum how long would some build-up/varnish like this take to accumulate?

OVERKILL, thank you for the fact/proof backed information and suggestions. It makes a lot of sense in how you describe there only being a usable amount of "space" for contaminants to be in suspension within the oil, especially with the wording Shannow used (polar and non-polar, which brought me...

Thanks bottom_feeder, I was worried there was some protocol after doing a cam swap, as I've heard mixed reviews. Thank you all for your help and input. It looks as though I will be taking the long-game approach, like gomes512 suggested it built up slowly, so I may as well dissipate it slowly...

That being said, is there a recommendation I should follow to ensure it doesn't become harmful sludge? Should I worry about cleaning the varnish off with something such as kreen?

Good Morning All, First off a bit of background: I have a 2008 Pontiac G8 GT (#880 of the first 888), its a 6.0L V8 that is fitted with AFM/DOD. The car has 93K on the clock and I first got the car at 82K. I recently had a sticky valve/lifter (not completely sure as I am more of a computer guy...