With over 100k, I agree. Any oil will do.casperfun wrote: ↑Mon Jan 31, 2022 6:22 pmLong story short, I use to buy amsoil at my local hardware store until I couldn't. Then bought amsoil online from people (non distributors). I prefer not to buy an amsoil membership just cuz.
Anyways, Since u can't easily find amsoil at stores and now that I have over 100k miles, I'm just buying the cheap stuff at walmart.
Moreover, since I'm changing every 4k miles now and no longer doing 15k oci's, it's fine now.
Why am I using Quaker State? Because after watching project farm, I read the comments, and somebody mentioned a blog where a real oil expert who actually studies motor oil and with a background in oil at the molecular level, not just a youtuber testing oil but a real scientist type of person found out through his research that Quaker State full synthetic BEATS Amsoil 5w30 in wear tests.
Easier to find, and cheaper to buy. A double-win!
Anyways, any oil, conventional, blend, full synthetic will be fine on 4k oci's.
The end.
Costco Kirkland full synthetic 10 qts for $25 would be my go to oil. Great oil and super cheap. I’ve never heard of one engine ever failing because of oil brand A over brand B. Some have been poorly designed with narrow oil passages that are prone to sludge like some of the Chrysler V6 and Toyota V6 is that if synthetic oils were NOT used, a “small number” of cars had some big sludge problems.