Looking for info
 

So dads truck, 08ish silverado 5.3, has developed a slight skip from time to time:..usually around/just leavin idle..dealer though it was an Injector..pulled plugs and found one nasty one..scoped the cylinder to find good bit of oil...so they tell him the aluminum block engines can't be rebuilt...and quote $9k in parts and labor for new engine...he leaves...calls me...I tell him to go back and cus them out..he doesn't...says he's just gonna change the plug every oil change and keep goin...

Could be simple as valve guides?...rings or ringland?....

Thoughts and or next step?

I believe that is sometimes caused by the displacement on demand. When it disables those cylinders I think it causes it to pull oil up on the piston and not burn it. May want to call JP and ask him if that's a possibility. If so he could turn it off and you may run a good injection cleaner through it to see if it will clean it up and see where it goes from there

Yep, most likely it's the DoD. My buddy has an 09 and it burnt a quart of oil every 1k miles due to it. I turned off the DoD and no more burning of the oil. He lost 2mpg, but that's it.

What all is involved in turning it off?

Very common in the dod trucks but usually not bad enough to cause a misfire. IT could have been unburnt fuel in the cylinder instead of oil. Valve springs are very common on them as well.

not saying it's not oil just thinking.

and i think you can get a junkyard motor very cheap....def not $9k....

Licensing it and disabling the DoD