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You should have seen my 2000 SS when I ran the Seafoam through it. Much worse than that and I did it twice! The LS1 cars have a problem with the PCV setup pulling oil into the intake and I could see the oil buildup on the TB so I decided to do the Seafoam twice. You should see when you drive it down the road at 3-4000 rpm's! I had a white smoke trail for about 2 miles and it cleared up just as I went around a corner and passed a cop. It definitely helped the car even with only 42K miles on it. I now run a filter on the PCV setup to catch the extra oil.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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