Originally Posted By: MarkStock
Interesting.
What oil were you using before M1? I presume no problems before then?
What mileage do you have? Any idea of how far you'll push the Amsoil?
1st thing, I checked my service records and I put in the Amsoil on Oct6 @ 64K, and today I have on 71,000 miles. Not as much as I thought.
I was always doing 4000mile OCI since I bought the truck (Dec'11 with 31,000miles) with whichever conventional 5W-20 was on sale. Then in spring I tried Mobil 1 and ran it 4000miles too. It was at the "add" line at that time so I figured I would change it. Won't by it again. I know many people swear by it, and that's fine. I don't.
I work 400miles from home, so doing oil changes with Amsoil isn't the easiest thing to do. I will change it when I get home at Christmas time. Likely will have around 10,000 miles on it by then. Now that its getting cold, the truck idles an awful lot too, like all day!