BTW I liked the the PDS info spread sheet; very cool. NOACK is not really much of an issue in 20wt applications since the oil temp's are so well contained. The 5W-20 is basically a dino oil grade that's unique to NA. It really makes little sense to buy a 5W-20 syn' oil since you're gaining little over a 5W-20 dino. The key to cold start performance (and during the entire warming up period) is choosing an oil with a high VI. That's the sole reason the Japanese OEMs have adopted the 0W-20 grade. The leader in this area is Toyota and their 0W-20 has a 216 VI. The Valvoline SynPower's VI of 169 is slightly below average for the grade and is lower than the CoP made Honda 0W-20 with it's 177 VI. (As a point of interest Honda/Acura Canada uses the Idemitsu made 0W-20 with a 200 VI.) SynPower will be about 10% heavier at 0C than the CoP made Honda 0W-20; not a big deal, but it's almost 40% heavier than the Toyota 0W-20 at the same temperature. Even at room temperature it's more than 25% heavier.
Originally Posted By: bourne
Thanks Caterham ! Among 0w20s is synpower a good formulation ? I understand 0w20 "flows" better , but what about the protection during summer months ? I wasnt a big fan of the NOACK scores of Durablend 0w20 , 5w20 seems more stable. Am I wrong ??
Originally Posted By: CATERHAM
First welcome to BITOG! Considering how you drive your vehicle the selection is easy. First choice is SynPower 0W-20. Second choice is Durablend 0W-20.