I order a 3.0 duramax in 2019 and i was one of the first to get my hands on and i drive 100k a year no problem, right now i have 156k and had no issue whats so ever the whole time, except now its in the shop and waiting for timing chain and belt parts, crank chain was streatched about an inch" dealer says its from using old oil, who in the crazy world would use old oil? I ask the dealer, i told them to pull up my history purchases and look for oil change records, all done by the same dealer, BANG back fire no longer was the issue of old oil, so warrenty is fixing the whole nine yards,