I'm all about synthetic oils, starting out with Mobile One, to running Royal purple for the last couple of years. I've had two vehicles that are a testament to syn. oil. One was a Thunderbird turbo coupe that I decided to have the head ported, polish and cc'd. Had 50,000 miles on rocker arms, and I decided to have the speed shop replace them. Unfortunately, due to other issues and the owner preparing his alcohol dragster, the two boxes of rockers were mixed up. I wasn't a happy camper, but after mic'ing the rockers no differences could be find including wear patterns.
2nd case was our 88 GT that lost oil pressure toward north of Colorado Springs. Speed limit 75 my wife was doing 90 trying to beat the hail storm that was on the way. Didn't make it, and a horrible noise was coming from the motor. The car was driven 15 miles back to a dealer that stated the engine was completely blown. Since I don't trust most dealership's I told the car back home, and we dissembled the engine. The only damaged found was the broken oil pump shaft.
__________________ ‘88 LX Hatchback: 351 stroked to 408 w/4 bolt mains & steel crank, 12.5 :1 forged pistons, Cartech “Bread Box” upper/Edelbrock lower(ported and polished), BBK 75 mm Mass Air w/120 lb injectors, Dart II ported, polished O-ringed 2.02/1.60 heads, Custom Competition Cam hydraulic roller w/Roads lifters, Hypertech custom chip, 1100 hp Aeromotive Competition fuel kit, 9” w/ 4.86’s, Tremec T56 six speed, , Hotchkis performance suspension, 400 shot of nitrous. Passes emissions running E85. | 
