What motor oil brand do you use?

UPDATE:
I finally change my oil to Conoco "Guardol ECT" a Synthetic Blend. At $10.22 a gallon. All I can say is, what a difference. Smoother all around, oil pressure holds even at warmer temperatures and the best part is, I'm getting 7.2 mpg, I had an increase. For the some reason, probably.....old oil needed to be change at 13,000 (Delo), mpg's had drop to 6.8 while I been getting 7.0 on average. But now, I'm at 7.2. I don't think I will be going back to conventional oil anytime soon.

 

Is it the same weight as the delo?

 

Yeah, blends are often overlooked, yet they can offer a great value and deliver some impressive results.

 

Yes, 15/40