Is DEXRON ULV a true ULV? The only specs I can find for DEXRON ULV are on parts.gmc.com viscosity 29.2@40C, flash point 220C, pour point -40C. All other ULVs viscosity @40C is 19-20cst. Is GM using a different measurement standard than everyone else ASTM D445? A viscosity of 29.2 @40C is close...