I have a 2011 Chevy Silverado 5.3 LTZ with 155,000 miles. In the last year it started burning oil excessively and fouls the plugs, I have read most of the questions and I’m definitely going to make it a fuel and crankcase additive regiment. My question is, would it be OK to pull all of the plugs and pour Sea Foam right into the cylinder head to break loose any sticking piston rings?
Hi Kevin. What I would do: 1) Start adding half a can of Sea Foam High Mileage to your crankcase every oil interval. 2) Do a Sea Foam Spray treatment (or 2) through the throttle body. If you see a lot of darker smoke after the hot soak, could mean you have a lot of buildup around the piston rings. 3) Pull the spark plugs and spray a healthy burst of Sea Foam Spray into each cylinder, then crank the engine for a second with the plugs out. A lot of mechanics like to let things soak for up to 3 days with the plugs out, adding a burst and cranking the engine each day.
Check out this blog feature on the topic: https://seafoamworks.com/stop-the-smoke-cures-for-burning-oil/