Summit Racing oil
@S'cuder, I didn't forget, but I just got home again yesterday.
The box just says 3589 on it, but here are pics of front, back, and bottom of the bottle. (Got a couple valvoline racing 50wt too, SG also)
In case you can't see it...
1821/1 V111F/STK3589
View attachment 1715949638
View attachment 1715949639
View attachment 1715949640
Clearly, I was wrong about it being SD, lol.
Thanks, that helps a lot.
3589 was the part number. There were all four digit part numbers until the merger with Quaker State. Easy to remember. They then went to longer numbers, and it took a while to use them enough to memorize them.
The date code is VI11F.
V stands for the packaging line. I don't remember it, it may have been a contract batch. Or more likely I just forgot.
I, being the 9th letter of the alphabet, indicates the 9th month, September.
11 is the day of the month.
F is the 6th letter of the alphabet, corresponding to the year, in this case 1996.
So this bottle was filled exactly five years before the 9/11 attacks.
API SJ was introduced in 1996, so this was already one or two ratings obsolete. By reading the label, it's clear they didn't want it to be used in passenger cars. As I said, I was told that was because of the high ZDDP levels were known to cause pitting and spalling. They wanted to avoid liability from damage caused by a misapplication. I did sell a bunch of this stuff to Harley aftermarket shops. They loved it.
For a long time previous to this bottle, the GT 50 was rated SD. Thanks again!
