Only done about 3000 miles on this set-up, but not expecting any issues. PSD(allegedly) toothies; toothed belts dramatically reduce strain on bearings. Oil is used for hot qualifying laps in many U.S. motorsport events, so if you can trust your mega-bucks engines to survive a thrashing with it, then pumping it through simple, relatively load free bearings shouldn't present any problems. Temperature after fifty miles motoring is about 45 degrees C if I remember correctly. Pressure is interesting; up to about 4000rpm it holds about 5psi, then between 4 and 5000 rpm it falls slightly(I reckon the bearings are offering a lower resistance at that speed) before rising to 6/7 psi at 6000rpm upward. Oil still very clean at this time although I would recommend flushing your charger with something cheaper before using the Joe Gibbs XPO; it's about £20 a pint.