For all the British vehicle experts/nuts

[jdmcm]

I have spoken with a pilot friend who is in charge of several "Merlin" engines, the supercharged cousin of the meteor, he stated they use 100wt mineral oil in the Merlins, I assume due to the engine spending much more time at higher rpm's. Gonna be a smidge thick for the Centurion. I am definitely leaning toward the Shell Rotella 15w/40, now a guy needs to figure out the rest, transmission, differential, final drives etc.