Originally Posted By: dave1251
Originally Posted By: Branson304
Originally Posted By: Gene K
Valvoline conventional will go till the IOLM tells you to change. The 5.0 is easy on oil and has an 8.0 qt capacity.
I don't think I would follow the OLM on a conventional oil without a used oil analysis to establish oil life at different mileages.
According to this logic you should not follow the iOLM with Mobil 1 Extended Performance without a used oil analysis to establish oil life at different mileages.
OP Valvoline conventional will serve your needs well.
But you know that Mobil 1 Extended Performance is guaranteed for 15,000 miles don't you? Conventional oil is not to be trusted on most oil life monitors if you ask me. Conventional oils are pretty shot by 7,500 miles in normal driving. Of course this depends on your conditions & engine but this is just from the general consensus of used oil analysis I have read. If I didn't care about my engines, I'd run an OLM oil change interval on one of them & get a used oil analysis for you. No way I am going to blindly trust a conventional oil to 10,000 miles & I think most would agree. We all already know synthetics handle this easily so why would we do anything else?