75k miles on my 09 Sierra, no oil burning issues to speak of. Did the valve cover swap, added an oil catch can and got a range afm disabler once I got on this forum and realized how many people were having issues. I figured this is cheap insurance just in case oil consumption did start. I did notice a big oil stain on the block underneath spark plug 1 when I changed my plugs last year, that was before I added the mods stated above. No new stains since.