Originally Posted By: HTSS_TR
He wants to change his oil while he's with you so that you will pay for it ? Smart boy !!!
Use xW20 with confident, if I'm using xW20 in E430 (spec'd oil is Mobil 1 0W40 or GC) without problem, Wrangler should have no problem with spec'd oil. Actually, my E430 likes xW20 better than Mobil 1 0W40, it is much quieter and rev much easier with MPG improved by about 3-5%.
You like Mobil 1, there is no reason for not using Mobil 1 0W20 in Wrangler engine.
With the money he makes he can afford the oil. It's a father son thing. Like you, I really like the 0-20AFE in the Duratechs, so we may just go with the 0-20.