I recently picked up a 300zx Twin Turbo. The engine had a dented oil pan with horribly low oil pressure. The Sump is 3.5qts, which has to feed 2 heads/turbos. A high number of 300zx Twin Turbo's you find on the road have dented oil pans, due to replacement engines being set on the pan during shipment. The extremely tight clearance between the bottom of the sump and the pickup, causes low oil pressure, which ruins the top end and turbo's.
I took the car on a 3,000 mile trip from MN to SC. Before the trip oil pressure peaked around 30psi at any rpm range. Factory spec is ~60psi @ 3k rpms, and ~15psi/1k rpm after that. I decided to take a chance not really knowing the severity of the problem.
I installed a magnetic drain plug, Rotella T6/Motorcraft FL400s, and a full bottle of MoS2. I did some spirited driving through the mountains, some high speed runs, and even though there was horrible lifter noises (and some knocking), I make it home after 3 weeks. I was dumb enough to leave the oil in for another 4 months until late spring.
No I did not get a UOA, which I should have done, but there was absolutely 0 metal shavings on the MDP. Which was wierd because my 240sx usually is covered in a fine layer of shavings (possibly from the timing chain). I replaced the oil pan with a non dented one, and oil pressure is prefect. Everything else looked great when inspected as well.
The fact here is, 2x turbo's; no oil flow; mountains, I should have not made it back, no questions. I believe MoS2 prolonged major damage from happening, and it will ALWAYS be in the engine of that car.