Nothing has been deleted. disabled or removed. The OLM reaches zero at 13,000 kms, or about 8,000 miles in the old money.
I did one UOA with 15w40 CJ-4
when the truck was about 2 years old. All I learned from the uoa is that I no longer needed to do uoa's using xW40 HDs on this engine.
With 15w40, oil consumption was about one litre per drain interval. In other words, by the time we changed the oil, it was on the add line,
and slightly below add with 0w40s. We always used the 2014 and newer long filter.
The 2013 5.3 is a 5w30 engine, the 2014 and newer, 0w20.
The transmission has been drained and filled 3x with Dexron VI with one trans filter last year.
T-case 3x with PC dura-drive. F&R diffs 2x with 80w140 GL-5. Chevron the last time.
Tires this winter and last, GY studded Duratrac 275/70/18E on 18x9 Fuel, zero offset. Old set for summer now, 275/60/20E Nitto EXO studded on the stock 20x8.5" wheels. The truck is a SLT crew cab short box.