Synthetic VS. Regular oil reliability

[1stToyota]

Originally Posted by TheSilkySmooth

Well, dont put M1 0w-30 AFE in (im running it now) Its too thick for a FE oil - though its SUPPOSED to have good cold flow properties. I even had to take my high efficiency BOSH oil filter off due to loud valvatrain and other noised at a 15 degF cold start. I would opt for Pennzoil Platinum 5w-20 or (0w20 if toyota approves) or a pan heater and a blosk heater - AND a heated garage

I'll probably do my OC today, using M1 0w-30 AFE...they're predicting near zero with -20 wind chills for the next few days, plus it's been nearly 5k miles since the last service. I'll do the UOA [Blackstone Labs] and have them to do the additive package test on the M1. After that I plan on switching back to my normal PP 5w-30, have Blackstone do the same testing and see which one offers the best protection and fuel economy. Hopefully there will be a clear winner.