Good Lord!quote:
Originally posted by ToyotaNSaturn:
Thickest 20w-50 I've seen is Castrol's High Milege product. It has a cSt@100c of 20.3
Assuming they start with a 20w base oil I did not think there would be that much viscosity index improver added to get a 20W50. It's viscosity index is lower than even a 10w30, indicating that its viscosity changes less (from cold to hot) that a 10w30 does, and which leads me to believe it is a pretty stable oil, unless it is poorly manufactured.quote:
Originally posted by TR3-2001SE:
I think you are looking for the wrong thing. Most 20w-50 dino oils will be low 40 weight in a few thousand miles if not 30w.
Hot idle or cold idle?quote:
Originally posted by Racerjk:
Even with 20w50, the oil pressure is not much over 20-25 psi @ idle.
What's the thickest 20w50 out there?Mobil 1 V-Twin - SUS Viscosity @210F (tested) = 101.8 in a revcent VOA. Real high 50 weight. Pretty good add package too. Awfully expensive though.