RocketcarX
95% of my weight is fuel
Whatever choice you make regarding oil def stop using the STP treatment.Was thinking about this at lunch. It makes no sense for a mechanical problem to cause both the cams to go full retard at the same time. It just seems odd to have both banks act up at the same time and have it be mechanical. This seems like it would be more likely to be an electrical thing. The solenoids are electrical. May be oil related, but not leaning that way just yet. I'll keep the 5W-30 in my back pocket.
Since I will pretty much just be towing in the summer, 5W-30 for harder working (higher oil temps) higher mileage (looser tolerances) 5.4 3V would be ok.
I like the critical thinking good thought process