Re: oil pressure drops
Mileage isn't everything. At the local Babcox & Wilcox plant, they get a new 1/2 ton every few years. It only gets 8-10K during that time, as it's primarily driven around the plant, but it's ALWAYS running, so 12+ hours or idling time in the winter days and 8+ in the summer. The last truck they had, idled to death ('05 F150 4.6L) and it was just over three years old. Neglected maintenance was found to be the cause. If it didn't log the hours idling, but driving, it would have over 250K on it.
I picked up an old 1932 Ford Model B pick-up several years ago. As soon as I attempted to drive it up the hill outside the garage, it would stall out and I'd roll it back down. Turned out, after I took the engine apart that I could literally PULL gobs of built up oil out of the engine. Only about 1/2 quart of oil was liquefied, the rest was jell-o. Cleaned it all out, and it actually run like a champ, albeit smoked like crazy.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!