Hi,
First time post to the site, though I've been coming here to get info for years.
On Monday, Wednesday and Saturday I went to 2 different Walmarts and our local PEP Boys for 7qts of Mobil1 5w20 for my '06 F250XLT w/ 6.8L V10 and 5qts of Mobil1 5w30 for my '96 Buick Roadmaster S/W w/ the 5.7L LT1. Both of these stores have been out of my oil all week.
So, I did it, I picked up 12qts of Castrol Edge 5w30, a Motorcraft and a Purolator oil filter. Total cost $108, yup I can feel it in the pit of my stomach.
My F250 uses 2qts of Mobil1 5w20 over the course of a 5000 mile OCI, and about 1 and 1/2 qts of Motorcraft Semisyn 5w20 over the same OCI. The engine/truck only has 55,000 miles on it and has had this type of oil consumption since new. The Buick has 180,000 miles on it and doesn't use any oil that I can notice over a 5000 mile OCI. I bought that car 4yrs ago when it had 119,000 miles on it. I've been using Mobil1 in all of my vehicles since 1993.
I've never done a UOA on either vehicle, though I have 2 Blackstone bottles ready to fill this weekend and will send them off after each oil change. After that I plan to run Castrol Edge 5w30 in each engine for 5000 miles and have a UOA done on that oil as well.
I fully expect to get 8x better engine protection, 8x quicker acceleration, 8x better fuel economy, and get lucky with the ladies 8x more often. Hmmmm lets see 8 x 0 = 0, yup sounds about right.
I'll post my results when I get 'em, in about 6 months or so.
Enjoy,
RustyFuryIII