Hello and MERRY CHRISTMAS to all. What would I end up with if I mixed some M1 0W30 with some M1 5w40 TDT? If I mixed some M1 0W20 with some M1 OW30 would I have a light or heavy 5w30? Is there a calculator I could do this blending stuff on my own? I am very interested in the "CATERHAM BLEND" for all of my vehicles just bit heavier for the truck.