Long time lurker, first time poster. I bought this truck in December 2017 with 20K miles, this is the first oil change and I had a UOA done to see what the oil was like since I had no idea what was put in or when. I assume it was 0w20 ACDelco as I purchased the truck from a GMC dealership. Oil filter was an AC Delco PF-63E. The fuel dilution is over 10% and below grade according to the info. The suggestion is to get the fuel system checked but I find this odd as the truck does not get poor fuel mileage (sure gets a lot better than the 95 Tahoe that I had before this). I also did not notice any increase on the dipstick, which I check at least once a month. Never had to add any oil during the 4K miles that I put on the truck either.
Just looking for any further suggestions on the data here. The iron and copper are a bit higher than normal wear according to the lab. The truck is still under warranty so I could take it in and have everything checked without any cost other than a bit of my time. Truck runs great and I haven't had any issues during the last year of ownership. This is my first newer vehicle in quite a while, I also have a couple of older Camaros that I enjoy when its nice out. I do have a very short trip for work, I only live a couple of miles away so the truck rarely gets up to temp during this 5 minute drive. However, I do take it on longer drives at least once a week where it does get up to temp and do the occasional hauling and towing when needed. Any info for those who are more familiar with UOAs would be appreciated, I know a lot about cars but never used a UOA before. I figured since the first 2 oil changes came with truck truck from the dealership that I might as well see what info I would get from a UOA.
Just looking for any further suggestions on the data here. The iron and copper are a bit higher than normal wear according to the lab. The truck is still under warranty so I could take it in and have everything checked without any cost other than a bit of my time. Truck runs great and I haven't had any issues during the last year of ownership. This is my first newer vehicle in quite a while, I also have a couple of older Camaros that I enjoy when its nice out. I do have a very short trip for work, I only live a couple of miles away so the truck rarely gets up to temp during this 5 minute drive. However, I do take it on longer drives at least once a week where it does get up to temp and do the occasional hauling and towing when needed. Any info for those who are more familiar with UOAs would be appreciated, I know a lot about cars but never used a UOA before. I figured since the first 2 oil changes came with truck truck from the dealership that I might as well see what info I would get from a UOA.