Yeah, I just train myself because I am in city 24.7 as well. And the proof it works is I have <.5 fuel in my oil and you have 1. and 1.5 fuel in your oil, that is why I say what I say. I go 10k miles and 2 years on my oci as well. Even though that isn't a ton of fuel, it is enough when added to the wear numbers for the extra 2k miles that suggests the TAN level could be in play. Even if you don't keep getting uoa's after this, the next couple are important imo, now that you have found something. For the last 6 years it is second nature to me, I turn key and press TH button, every time I start the truck. If you can remember to press TH every time, maybe you will have next to zero fuel in your oil, and you can teach the entire forum something, and if that is the case and that corrects Tan in theory you could even go back to 10k oil changes.
LOL, there is a lot of ifs there, but TAN would be worth it. Please follow up with us when you get the next one, very interesting.
