Spec comparison Delvac 1300s vs RP 15w-40

[glxpassat]

Delvac 1300s - Royal Purple 15w-40

Viscosity, ASTM D 445
cSt @ 40ºC 114 - 110.1
cSt @ 100ºC 15.0 - 14.9

MRV, cP, ASTM D 4684 19,000 - 21100

Viscosity Index, ASTM D 2270 137 - 140

Flash Point, ºC, ASTM D 92 236 - 224

Could somebody please tell me if the Delvac is more like a synthetic or if the RP is more like a dino? These oils seem very close, except in price of coarse. Thanks!

 

[mdocod]

For some reason I've always kinda considered RP to be a "fake" designer oil, more about a fancy package an prestigious name than about what's in the bottle(selling a price tag), and this kind of comparison seems to back that up, lol. There's been plenty of other evidence crop up that it does not perform like other true synthetics.

 

[glxpassat]

Wow, I can't believe there's no discussion on this! Maybe I asked the wrong question! OK, here's another, as this just doesn't make sense to me -

I have always associated a lower flash point with a thinner base oil with more VII's in the oil. Here we have a dino oil that has a considerably higher flash point than a supposedly pure PAO synthetic with basically the same viscosity specs. I would expect the PAO, with a higher natural VI, to not need the VII's like the dino does, hence it would have the higher flash point. Am I wrong here? How does these two oils spec out so close in viscosity and the dino have the higher flash point? Thanks for any help!

 

[JAG]

RP has said they use Group 1 as additive carrier so that could hurt all of those specs. Maybe Delvac uses some Group 5 as additive carrier which would improve all of those specs?

 

[Ryan02SS]

I've always been impressed with Delvac 1300 in a variety of applications. This just adds more accolades to it's reputation.