Originally Posted by shybx1969
The only thing i wanna add is whats good for tony stewart...may not be so good for john force....does a drag engine wear different from say a pulling truck engine...just curious. :?
Of course. A NASCAR engine generally fails because of a valve train issue (High RPM for long durations) where a Truck will probably fail from bottom end bearing failure.
Drag engines are a little different because of the many different kinds of drag racing. With the advent of electronic rev limiting devices, most drag racers have pretty much confined their breakage to random parts failures, and common sense usually will limit how hard you buzz your bullet . .
Forced Induction engines will suffer bottom end failures and Nitrous Engines (with and without turbos) get piston and ring failures from high combustion chamber temps. Those are "General" differences and the "General" failures that come with them.
And in all of those, while requiring a good grade of oil, the kind of oil used usually doesn't contribute greatly to those failures named above . . As the engineer who ran all those tests illustrated.
The best thing you can do with your oil, is to pay attention to it. As has been noted by several correspondents, look closely at the oil on the head when you "Run Your Valves" and after a race weekend, let the car sit for a few hours (or a day) and then drain a quart off the bottom, unscrew the filter, cut the filter open, and inspect both the drained oil and the contaminants caught in the oil filter. Any more than trace "Sparkles" could mean that you may have a problem.