the 4500 manual states using the low oil after break in, i don t know about the 2500.
you cant find this fuel any more, the low oil, i'm just going to add 3 pints methanol to a gallon of
5 or 10 percent nitro 20 castor to get the oil level down after break in , it may not even make a diff, but i'm inclined to go by the manual