Imagine if you will 20-20 oil with perfect vision!
Last edited:
I think it was a SAE 20 monograde oil that also passed the 20W winter starting test (whatever it was back then). Which not all SAE 20 would have passed, depending on the quality of the base oil.
Remember “W” stands for winter (not weight).
Generally 20W20 was a straight 20 with poor point depressants added. Although that Kendall if it's made with modern base oils may just be group II or a blend of some group I with group II.Probably no VII. Here is a Kendall 20W-20 API SB with VI = 95:
The deal was closed in 2002, but it was at least a couple of years before the required divestitures and government and shareholder approvals were finalized. Until then, the old PQS corporate structure remained in place. The day after final approvals, we got a Shell swag bag via FedEx which included a letter saying nothing would change. Yah, right.Shell Oil bought Pennzoil in 2002.
Very likely correct. Since the Pennzoil 20W-20 wholesale price was identical to that of SAE 10W, 30, 40 and 50 for many years, it's doubtful it had extra additives.Probably no VII. Here is a Kendall 20W-20 API SB (nondetergent) with VI = 95:
Quaker State had a product labeled as such before the Pennzoil merger in 1998. And I wish I could still buy the old Pennzoil GT 20W-40. Grumpy Jenkins favorite, and would be a great classic car oil.I don't remember which brand it was that made an oil that was labeled as 10W-20W-30.
Also here in Spain there are two brands that still make 20W-40 PCMO.
By 1960, Chevys that used splash oiling were at least about 10 years old.I seem to remember that 20w20 was a popular oil for chevys that still had a splash oiling system. Must have been 1960 or earlier.