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I use Castrol Syntec, but the dealer said the sludge looked like a Pennzoil product from the type of sludge buildup....possibly a 10w30 regular motor oil.
One of this forums sponsors is Pennzoil with a "Feel The Clean" ad at the top of this page :confused:.
I thought engine flushes were b-s and a waste of money, but a couple of mechanics I know flush their own engines on their daily drivers. I wonder if you can do that on a turbo?
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