Standard procedure in past decades was to use break-in oil in a “new” engine for the first 100 hours. During that time, it was recommended to vary engine rpm and load, and to run the engine ...

If not, the engine might burn too much oil, diminishing the ... lengthier periods between servicing, but new engines still will benefit more from a break-in. When driving a new car, take it ...

Picture it: You finally have some break-in miles on your new 2024 Ford Mustang ... including the big cover beneath the engine ...