Gokhan
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Originally Posted By: Blue_Angel
Originally Posted By: CATERHAM
The other main difference is that TGMO is using a very high VI multi-branched PMA type polymer VM.
Originally Posted By: Gokhan
Therefore, my current thinking is that TGMO 0W-20 SN is a mix of Group III (perhaps Group III+) with Group V alkylated naphthalene. If it's true that TGMO 0W-20 SN has Group V alkylated naphthalene, this is yet another huge quality advantage of TGMO 0W-20 SN over other synthetics in the market, making it a uniquely top-quality oil.
So if all these thoughts about TGMO are true, how do we feel it would stand up to high shear applications like turbocharging? Are the VII's suspect as a weak point? Does the Group V content add stability?
Curious as one application of mine is a turbocharged engine that is traditionally a little hard on oil's viscosity (Cruze 1.4T). Toyota isn't into turbos.
A typical 0W-30 certainly has a lot more VIIs than a typical 0W-20. A typical 0W-20 should have a little less VIIs than a typical fully synthetic 5W-30.
TGMO 0W-20 SN seems to be a very shear-stable oil according to the UOAs.
Regarding Group V alkylated naphthalene, if TGMO 0W-20 really has it, it would increase its oil-film thickness in the elastohydodynamic-lubrication (EHL) region (the critical region right before metal-to-metal contact starts) greatly. This is thanks to the really large pressure - viscosity coefficient of Group V alkylated naphthalene. Group V alkylated naphthalene also increases the cleaning ability of a Group III oil greatly.
I think you can use it in a turbo application with excellent results. NOACK seems to be very good from the very little oil consumption I have with it.
For some reason ILSAC excluded the 0W-20 grade from the turbo specs in GF-5 but I don't know the reason and it seems silly. Perhaps they think no one uses 0W-20 for turbo applications.
Incidentally, my second UOA results for TGMO 0W-20 SN will be available soon.
Originally Posted By: CATERHAM
The other main difference is that TGMO is using a very high VI multi-branched PMA type polymer VM.
Originally Posted By: Gokhan
Therefore, my current thinking is that TGMO 0W-20 SN is a mix of Group III (perhaps Group III+) with Group V alkylated naphthalene. If it's true that TGMO 0W-20 SN has Group V alkylated naphthalene, this is yet another huge quality advantage of TGMO 0W-20 SN over other synthetics in the market, making it a uniquely top-quality oil.
So if all these thoughts about TGMO are true, how do we feel it would stand up to high shear applications like turbocharging? Are the VII's suspect as a weak point? Does the Group V content add stability?
Curious as one application of mine is a turbocharged engine that is traditionally a little hard on oil's viscosity (Cruze 1.4T). Toyota isn't into turbos.
A typical 0W-30 certainly has a lot more VIIs than a typical 0W-20. A typical 0W-20 should have a little less VIIs than a typical fully synthetic 5W-30.
TGMO 0W-20 SN seems to be a very shear-stable oil according to the UOAs.
Regarding Group V alkylated naphthalene, if TGMO 0W-20 really has it, it would increase its oil-film thickness in the elastohydodynamic-lubrication (EHL) region (the critical region right before metal-to-metal contact starts) greatly. This is thanks to the really large pressure - viscosity coefficient of Group V alkylated naphthalene. Group V alkylated naphthalene also increases the cleaning ability of a Group III oil greatly.
I think you can use it in a turbo application with excellent results. NOACK seems to be very good from the very little oil consumption I have with it.
For some reason ILSAC excluded the 0W-20 grade from the turbo specs in GF-5 but I don't know the reason and it seems silly. Perhaps they think no one uses 0W-20 for turbo applications.
Incidentally, my second UOA results for TGMO 0W-20 SN will be available soon.