- Oct 9, 2009
- Reaction score
- Midwest City, Oklahoma
- Vehicle Year
- Make / Model
- Engine Size
Yeah, when I used to work at Chief Auto Parts back in the early 80's, out biggest seller was Castrol GTX 20W-5.0. Couldn't keep that stocked up. People came in all the time and bought cases of it. Funny thing, we also sold lots of Valvoline 60 weight Racing Oil. Lots of it. And lots of straight 30 weight. Hence my propensity to liking to use 20W-50. But the reality is, it's getting hard to find even in auto parts stores here. I suspect there may come a time where the only 20W-50 I'll be able to buy will be motorcycle oil. I won't have a problem with it, should it occur. I don't have a problem with zinc. I think it's left out of car oil just for EPA requirements.20w50 is all over the place...even Wal Mart.
Available in both dino and synthetic.
Not used very much for current vehicles, but was widely used in the 80's and 90's
I just google zinc in motor oil. This is what I found, top of the list.
Seems like a good thing to me.What is motor oil with zinc? ... Its primary role is to prevent metal-to-metal contact between engine parts by forming a protective film. Despite being referred to as zinc, ZDDP also contains phosphorus, which helps to perform the anti-wear function in the motor oil.