Oil does not thicken as it heats up. All conventional oils thin out some as they heat up. The multi viscosiy oil has additives so that at the higher test temperature it is no thinner than the straight oil of the same number.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!