Yeah, I do find it odd to accept the cost of analysis and not buy the best oil you can afford. Then again, why buy Motorcraft when you can buy other excellent full synthetics off-the-shelf at a cheaper price? If you're somehow worried about this affecting your warranty, just buy one of the many full synthetics that have the Ford spec number on the bottle.
A sure thing, obviously. What I like to do is buy my choice of oil, take to local dealer Quick Lane, ask them to use my choice of oil instead. Last oil change, I brought copies of the two oil changes, showing results of viscosity and shearing effects. I query them if they using Motircraft oil, and proper 5W30 oil in their bulk tanks. Service writer looked up oil specs, which is MC stuff, saying yes it is. But I wonder….
Here you go. The higher initial cSt viscosity of QSFS 5w-30 helped on this longer run. This is probably what I'll stick with throughout the warranty period with 5-6K OCIs.
Crap…Was planning to use Blackstone to measure the fuel dilution in my full synthetic MC 5W-30…because of the fuel dilution TSB affecting my Maverick.
What doesTR in the fuel% section mean?Here you go. The higher initial cSt viscosity of QSFS 5w-30 helped on this longer run. This is probably what I'll stick with throughout the warranty period with 5-6K OCIs.
