Choate

Ok y'all. You may not believe this but I assure you it's true. I realized that all this oil loss started when I put my stock tune back on the truck to run 87 oct gas. I also seafoamed the truck so did that, ran the fuel down to when the light came on, filled up with 93 and put the Lew Tune back on. I drove for a week and almost a full tank of gas and the oil level has not dropped any at all that I can tell. Before, it would be down from the top hole on the stick to almost the bottom one in just 350 miles. It's hard to believe that just by turning off the AFM and cleaning the combustion chamber it made that much difference, but it did. I was to the point I was going to trade in the truck but now I'm going to keep it a while. I never did put the new valve cover on. Since my truck is a 2013 it already has the new one

Kinda an old post since the last reply but I’m going through this same thing. Bought the truck (2013 w the 5.3) with 117k miles July 2019. Checked the oil when I got it home and it was new and full. Then after a couple months and about 3000 miles noticed it was dripping down quite a bit on my driveway and was coming down off the filter. Filter was loose so I tightened it and checked the oil level. Not even on the end of the stick. Added 2 quarts and it got it back on the stick. Topped it off. Checked it every week or so and didn’t notice it going down much so I just figured it was leaking out due to the loose filter. When it came time to change it around 7500 miles or 20% on the oil life monitor again was a couple quarts low. Then I stopped driving much when covid hit until driving 750 miles to my parents for Christmas. One way trip it went from full to half way down the marker. Thought hmmm maybe I didn’t have it all the way full before I left. Made SURE it was full before I left their house and checked it the day after I got home and again exactly half way down the dipstick in 750 miles. I bought a new drivers side valve cover thinking maybe mine is clogged and for $50 I’ll try it and see if it’s helps. Haven’t gotten the part in yet but it’s definitely using more than any “normal” amount of oil right now. Other than that runs perfect

Anybody else see this? https://www.google.com/amp/s/gmauthority.com/blog/2020/12/gm-hit-with-class-action-lawsuit-over-vortec-v8-engine-in-full-size-suvs-and-pickups/amp/