New Castrol GTX Full Synthetic?

[Gokhan]

It goes back to why GM may not list a 5W-20 in the manual. It's not about the technical aspects of base stock interchange it's about CAFE. If GM wants to list 5W-20 as a recommendation then it would have to be part of the CAFE certification. It's not about properties and Annex E interchange it's about money and the law.

Again, I agree with you, and I never said the opposite.

What I was saying was that 5W-20, along with 0W-20 and 5W-30, is still an allowed dexos1 Gen 3 grade, regardless of what GM recommends for specific vehicles, and if a 0W-20 oil goes through a dexos1 Gen 3 certification, its 5W-20 sibling should more or less automatically be certified without engine-testing. In fact, I believe engine-testing isn't required for any dexos1 Gen 3 oil as long as certified third-party additive package and viscosity-index improver (VII) are blended into a base oil replacing the third-party additive company's originally tested base oil according to the API base-oil interchangeability guidelines.

 

[kschachn]

Again, I agree with you, and I never said the opposite.

What I was saying was that 5W-20, along with 0W-20 and 5W-30, is still an allowed dexos1 Gen 3 grade, regardless of what GM recommends for specific vehicles, and if a 0W-20 oil goes through a dexos1 Gen 3 certification, its 5W-20 sibling should more or less automatically be certified without engine-testing. In fact, I believe engine-testing isn't required for any dexos1 Gen 3 oil as long as certified third-party additive package and viscosity-index improver (VII) are blended into a base oil replacing the third-party additive company's originally tested base oil according to the API base-oil interchangeability guidelines.

Yes and I never disagreed with that either. Apparently we are talking about two different things. Sorry.

 

[ARCOgraphite]

Oil companies could get together and tell GM to pound sand with their DEXOs?

Do you want to sell oil? Pay to play or loose a big market share. The cost amounts to lost pocket change behind the sofa cushions.
I have not found dexos oils to do anything special or better in my cars in the past, But how would I know.
Seems like they are trial and error phase driven by D.I and high pressure turbocharging.
Now we have Dexos 1 gen III that promises even MORE turbo and piston cleanliness and much better SPI
prevention.
Maybe I'll find out if I get a turbo D.I. engine again.

 

[Drewby83]

Do you want to sell oil? Pay to play or loose a big market share. The cost amounts to lost pocket change behind the sofa cushions.
I have not found dexos oils to do anything special or better in my cars in the past, But how would I know.
Seems like they are trial and error phase driven by D.I and high pressure turbocharging.
Now we have Dexos 1 gen III that promises even MORE turbo and piston cleanliness and much better SPI
prevention.
Maybe I'll find out if I get a turbo D.I. engine again.

If none of the oil companies paid to play I guess GM would have to pay them to carry their spec instead of the other way around? Seems like GM has the oil companies where they want them via using their competitive market against them.

 

[kschachn]

If none of the oil companies paid to play I guess GM would have to pay them to carry their spec instead of the other way around? Seems like GM has the oil companies where they want them via using their competitive market against them.

Are you making the argument that dexos licensing is technically irrelevant and it’s also an unreasonable financial burden?

 

[Drewby83]

Are you making the argument that dexos licensing is technically irrelevant and it’s also an unreasonable financial burden?

It seems that way potentially as I've seen it described here as a spec the oil companies have to pay for to get the seal on their packages. I've seen some say such and such oil is good to run but they likely didnt pay for the DEXOs licensing. Slippery slope I know.

 

[kschachn]

It seems that way potentially as I've seen it described here as a spec the oil companies have to pay for to get the seal on their packages. I've seen some say such and such oil is good to run but they likely didnt pay for the DEXOs licensing. Slippery slope I know.

Everyone has to pay for all licenses and approvals. There isn’t any slippery slope as far as I know, dexos is a fairly demanding license. Good oils are defined by specifications, licenses and approvals, anything else is guessing and speculation.

 

[blufeb95]

It seems that way potentially as I've seen it described here as a spec the oil companies have to pay for to get the seal on their packages. I've seen some say such and such oil is good to run but they likely didnt pay for the DEXOs licensing. Slippery slope I know.

But consider dealerships and oil change places care about the licensing also the big blenders can get lucrative contracts with vehicle manufacturers to be their supplier, ie. Mobil supplies for AC Delco Synthetic & Toyota, P66 provides for Honda, AC Delco, Motorcraft and so on...