We use a lot of Swepco 306 at my friend's shop in classic cars and older trucks and equipment. It uses an older style add pack with high calcium, zinc and phosphorus. It includes Swepco's Dimonyl additive, which I am unsure of what it is. Doesn't seem to be picked up by spectrograph. All I know is the stuff is very slippery and has a sweet odor to it. It doesn't smell like oil.
True but modern ck4 15w-40 with a Volvo vds 4.5 rating is already loads better than what the engineers had in mind for when the 5.3 first debuted in 1999 which was just plain old conventional 5w-30. But supertech 15w-40 Is what I usually buy loads off, that sounds like the new full synthetic that's $15 instead of the $12 variant. I recently bought 5 gals of mag1 15w-40 on sale on Lowe's website and it's highlinewarren's main brand which also supplies Walmart with their super tech oils so I expect it to be the same performance wise.The Super Tech synthetic 15w40 looks good on paper. $15.84/gallon locally. The truth is pretty much any hdeo is more than adequate for just about anything....but this forum wouldn't exist if we just accepted that
Sounds like some odd stuff. Had no idea motor oil could ever smell sweet.
The only Delvac that is low phosphorus is the 1300 line and ESP in 5w30.
What is your test for slipperiness?
The API SN and newer limits on phosphorous (not zinc) only apply to xW-30 grades and below.
The very unscientific feel between the fingers. I'm not saying it IS slicker than other oils, I'm saying it FEELS slicker than other oils.
We’re talking about Delvac ESP.
Indeed, I should've clarified that the ESP 5w30 and 0w30 are the regular/light-duty M1 ESP.
Yes, phosphorous is the anti-wear component of the compound, zinc is there just to make it play nice basically.
Right, I agree, (for what that is worth) and that was my original point to @Kennedy01
Have you used the Providence 5w40 Syn? Real cheap, 80 bucks for 5 gallons
I mean, yeah, conceivably, they could just use more VII, but generally the heavier narrow spread oils like 15W-40 use heavier really cheap base oils that don't work for like say a 5W-30. Even if we are talking a 10W-30, you can see below that you need Group III (unless you are using XOM's GII+, but in different portions from the 15W-40) than for the 15W-40, which can blended with straight Group I (AP/CORE).
If I didn’t have half basemen stash of oil I’d look into that. Currently I have the Providence 10w30 for the Dakota after T5 rotella is used up.
Delvac in whatever flavor seems to be a gold standard in HDMO. I recently changed my oil in a 6.2 Gm diesel to the 15w40 Delvac 1300 Synblend, and it is running very smooth. Perhaps a bit quieter than the Napa 15w40 it replaced. Probably not true, just an observation, it is a bit colder temp outside now also.
