Originally Posted By: TallPaul
Originally Posted By: FrankN4
If there were a MaxLife heavy 40 or light 50 grade full synthetic I would not hesitate to use it.
Why not mix Valvoline MaxLife Synthetic 10w30 with Synpower 20w50 to make a very nice 15w40 to the 100 C viscosity of your choice. Since 20w50 Synpower is supposed to be PAO, you'd have a killer brew.
I had intended to do just that. I had even used the Rhomax calculator to get the exact percentages and ratios I would need to get the 100C cSt, 40C cSt, and HTHS that I wanted.
I talked with a Valvoline tribologist, not their tech line, and he said the two base oils were very different and that the "add pack chemistry" was also different to the point it would not be a good idea. It sure looks fantastic on paper though.