Originally Posted By: Hounds
FWIW, I agree with you that TM/Idemitsu's 0W-20 weight oil was specifically designed for Toyota's Prius
Wrong! Toyota 0W-20 is blended by XOM, not Idemitsu.
Originally Posted By: Hounds
and that it clearly is the ideal engine lubricant for that application -- i.e., use in a relatively low-rpm Sterling-cycle engine
Wrong again! The Prius engine is an Atkinson cycle engine.
Originally Posted By: Hounds
whether TM's 0W-20 has any special or additional benefits over M1's 0W-20 in a Otto-cycle engine operated primarily below the 50th parallel is really speculation which many years of UOAs have yet to substantiate.
Wrong yet again! Toyota's XOM blended 0W-20 has a MUCH higher VI and is clearly superior for cold/warm starts in WARMER climates because it is thinner at medium temperatures. Where XOM's M1 0W-20 has an advantage over Toyota's 0W-20 XOM blend is at very cold temperatures because it is thinner at sub-zero temperatures.
FWIW, I agree with you that TM/Idemitsu's 0W-20 weight oil was specifically designed for Toyota's Prius
Wrong! Toyota 0W-20 is blended by XOM, not Idemitsu.
Originally Posted By: Hounds
and that it clearly is the ideal engine lubricant for that application -- i.e., use in a relatively low-rpm Sterling-cycle engine
Wrong again! The Prius engine is an Atkinson cycle engine.
Originally Posted By: Hounds
whether TM's 0W-20 has any special or additional benefits over M1's 0W-20 in a Otto-cycle engine operated primarily below the 50th parallel is really speculation which many years of UOAs have yet to substantiate.
Wrong yet again! Toyota's XOM blended 0W-20 has a MUCH higher VI and is clearly superior for cold/warm starts in WARMER climates because it is thinner at medium temperatures. Where XOM's M1 0W-20 has an advantage over Toyota's 0W-20 XOM blend is at very cold temperatures because it is thinner at sub-zero temperatures.