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Chevy Suburban Oil Usage

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  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 58,480
    Might want to do a cylinder leakdown test on those two.

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  • There are a couple fixes for this oil consumption problem to try. I have a 2008 LTX with 215,000 miles, with all the same issues as everybody else. The 4 cylinders that deactivate when it goes into 4 cylinder mode are cylinders 1, 4, 6, and 7. These are the 4 cylinders that always get fouled from oil from these engines, because of oil getting in the cylinder when it runs in 4 cylinder mode. Im getting a programmer from Hypertech to turn OFF the AFM system. This will help to not foul plugs from extra oil by keeping the engine in 8 cylinder mode at all times. The PVC valve also needs replaced with the new improved design with a baffle in it so the oil cant sucked out into the intake as easily as it does now with the stock design. You need to buy the left side valve cover to replace the PVC valve because it is all one piece. (Bad design)

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