Bill.Satellite wrote:
In any engine! If you do not bring ALL of the fluids up to operating temps you are doing more harm than good.
From what I've read, the generally accepted consensus of studies that have been done show that a surprisingly large portion of engine wear occurs in the first several minutes after a cold start. I've read such claims as the majority in the first ten minutes of operation, but of course that's highly dependent on the total span of operation for each start; if you run an engine for only ten minutes each time, as an extreme example, then clearly all the wear must occur within the first ten minutes. On the other hand, if it is never or practically never shut down, say at a power plant or something, then the opposite would pretty much be true.