Originally Posted by Kjmack
Well it may be very unscientific but all the other oil pour fine and Royal purple does not . Maybe the Mobil , Castrol , Valvoline, Pennzoil exceed the J300 test and purple barely meets it .
Most A3/B4 type oils, including Mobil, Castrol, Valvoline, and Pennzoil, barely pass MRV for their grade. The ones that really pole vault over it are ILSAC certified lubes. Compare any 5w-30 ILSAC versus a 5w-30 A3/B4, or a 5w-40 HDEO versus a 5w-30 ILSAC, all which are "5w-" variants.
Well it may be very unscientific but all the other oil pour fine and Royal purple does not . Maybe the Mobil , Castrol , Valvoline, Pennzoil exceed the J300 test and purple barely meets it .
Most A3/B4 type oils, including Mobil, Castrol, Valvoline, and Pennzoil, barely pass MRV for their grade. The ones that really pole vault over it are ILSAC certified lubes. Compare any 5w-30 ILSAC versus a 5w-30 A3/B4, or a 5w-40 HDEO versus a 5w-30 ILSAC, all which are "5w-" variants.