Recent content by garyw

Thanks much for all your advice.

I only put on 5000 miles or less in a year. I will just change it once a year. If I switch to T4 15-40, won't it be pretty thick on a -20 degree morning and take a while to get up in the engine?

Yes, the 6.0 has been bulletproofed and deleted. I think the oil also drives the injectors.

I run Rotella T6 Full Synthetic 5/40 in my 2006 Ford F-350 6.0 Diesel. I had some engine work done and the shop added 2 quarts of Rotella T4 Conventional 15/40 because some oil was lost. I only had about 50 miles on the T6. Should I change it or leave it go until my usual oil change of 3000 miles.