Theyd thought a resonable quantity a necesity for endurance raceing . Long distance road work in summer gives a comparison .
If theres twice as much oil , it takes twice the time for it to go through , so it lasts twice as long before requireing changeing .
The problem is though , if its only half as big as twice as much , it only stays serviceable half the time . :mrgreen:
The alluminum alloy has a better element of conduction too , the necesity of a oil cooler being less likely .