It does relate in the sense that the aircraft that use sythetic don't even get oil changes. An oil sample gets inspected every xxx hrs of fly time...that's it. Unless there's excess particles/wear the oil stays in.
I think that's how he was trying to relate that the military uses synthetic for it's improved flow/break-down resistance.
Synthetic can stay in our engines for 5000+miles without a problem, even if you take it to the track occasionally.
Comparing an aircraft turbine engine to a turbo V-6 used for performance and racing is like comparing..............., well not even anything I would say in public.
Most smart racers with $10-25K engines change oil every 20 runs or so. We use leaded fuel, that, and lots of other contamination are forced by the pistons rings. Even on the street, boost forces more contaminates past the rings. Last I checked, turbines do NOT have piston rings!
Synthetic get contaminated just like regular oil, maybe even moreso since it is usually thinner when hot. Why would any turbo owner even consider going 5000 miles between oil changes?
Using diesel oil also has drawbacks. The diesel oil is formulated for low RPM use, usually 1/2 of a street or strip performance turbo Buick. Also, since there is more oil contamination in diesels, the oil contains more detergents which "cleans" cylinder wall making the antiwear additive LESS effective.
The Muscle car forums do many times recommend Rotella, or the like, for their older big V-8 cars. Since turbos are not present [usually!] and the drive back and forth to the car show, or off the trailer, does not involve much RPM, probably works for them.:biggrin:
Like I mentioned above, determine the use of your vehicle, and then decide on what oil is best for YOU!
My own experience, and now opinion, no owner or their cars, have been able to convince me that synthetic oil is worth 2 times the price of regular oil with the proper additive like Zddplus or the original EOS. That experience includes being inside over 500 turbo V-6 engines, plus many other makes, over the past 20+ years.:smile: