
Oil Analysis #2 2023 Silverado 5.3 WT
I bought this 1500 WT from a dealership who got several dozen of them used from U-Haul. I got it with 16000ish miles on it. I've had it for about a year and a half. I will assume it was abused for the 16k before I got it.
Most of my vehicles I do 5-6k oil changes on but it looks like I'm going to be keeping with 4k for now on the truck. Based on the last 2 changes I don't feel comfortable extending it out more. I didn't do any towing on this oil change. I was about 50/50 highway miles vs urban in that time.
I'm running 0w-20 per manufacturer recommendations and it's not currently burning any noticeable oil at 4k. I did not pay to have the TBN tests done. At 4k mile changes I'd be shocked if it was anything but good. I am considering 0w-40 in the future but I need some data and the engine needs to be out of warranty.
Side note: several labs do this kind of analysis. I just use this one because it's local to where I am. There are definitely cheaper ones, and it's arguable it's a waste of money. But since I've already been wasting that money, I wanted to share for some conversation.