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Of 0w-20 oils, which have highest VI #5446217 06/04/20 03:44 PM
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Bill_W Offline OP
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Bet this has been asked in the past, but with the motor oil formulation changes I thought it might be a start to see what is out there.

TGMO 0w-20 has a VI of 227 (2018)


Slick
Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446247 06/04/20 04:35 PM
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js1956 Offline
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That's some healthy VI in such a low multi-grade oil. Wonder how they achieved that.
And yeah, higher the better = More resistant to viscosity change.


2015 VW Golf Mk7 2dr HB Man 1.8 TSI S

Re: Of 0w-20 oils, which have highest VI [Re: js1956] #5446266 06/04/20 05:03 PM
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CT8 Offline
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Originally Posted by js1956
That's some healthy VI in such a low multi-grade oil. Wonder how they achieved that.
And yeah, higher the better = More resistant to viscosity change.

not necessarily so.


2015 F150 2.7
2018 F350 6.2
Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446278 06/04/20 05:33 PM
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Just go for the extended drain 5w20. You don't need 0w20 in SoCal.


"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah
Re: Of 0w-20 oils, which have highest VI [Re: CT8] #5446301 06/04/20 06:12 PM
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LubricatusObsess Offline
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Originally Posted by CT8
Originally Posted by js1956
That's some healthy VI in such a low multi-grade oil. Wonder how they achieved that.
And yeah, higher the better = More resistant to viscosity change.

not necessarily so.


Right. I still can't find clear answers about lubricity and stability of VII additives. Gokhan goes into much detail about calculated HTFS (severe lubrication) capability, which seems to discount VII additive. (e.g., VII additive does nothing, really)

Reminds of the old Detroit 2-stroke smokers running straight weigh 40's & 30's to keep the rod slipper bushings from failing from too low viscosity. Or the original PAO's with "naturally high VI". So much fog factor marketing now.

Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446308 06/04/20 06:18 PM
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Bill_W Offline OP
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Does high VI numbers come down to VI improvers? TGMO is a GTL.


Slick
Re: Of 0w-20 oils, which have highest VI [Re: CT8] #5446415 06/04/20 08:33 PM
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js1956 Offline
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Originally Posted by CT8
Originally Posted by js1956
That's some healthy VI in such a low multi-grade oil. Wonder how they achieved that.
And yeah, higher the better = More resistant to viscosity change.
not necessarily so.


True.
Also viscosity has nothing to do with how well it protects engine against wear like some people maybe think. That's where additives come to play.

One needs to also look at cSt @ 104°F and cSt @ 212°F and calculate how much reduction in viscosity there is between those two temps.

Yeah, there's lot more to oil than just a VI number.


2015 VW Golf Mk7 2dr HB Man 1.8 TSI S

Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446493 06/04/20 10:38 PM
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CR94 Offline
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Originally Posted by Bill_W
... TGMO is a GTL.
Since when?


2011 Toyota Prius now at 111K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446507 06/04/20 10:58 PM
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VI isn't a parameter I really care much for. I also don't follow the mantra that all VII is bad as some VIIs are very shear stable.

A higher VI is not synonymous with a superior base oil. In fact, it can mean exactly the opposite in some applications. I look at the CCS, KV100, NOACK, and HTHS. The actual composition of the oil is equally as important. An oil that's all homopolymer PAO can have a very VI, but make a terrible engine oil.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Of 0w-20 oils, which have highest VI [Re: CR94] #5446508 06/04/20 10:59 PM
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Bill_W Offline OP
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Originally Posted by CR94
Originally Posted by Bill_W
... TGMO is a GTL.
Since when?

Since you asked...
https://www.bobistheoilguy.com/foru...56846/all/Toyota_TGMO_0W-20_SN_VOA_with_


Slick
Re: Of 0w-20 oils, which have highest VI [Re: RDY4WAR] #5446926 06/05/20 01:33 PM
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LubricatusObsess Offline
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Originally Posted by RDY4WAR
VI isn't a parameter I really care much for. I also don't follow the mantra that all VII is bad as some VIIs are very shear stable.

A higher VI is not synonymous with a superior base oil. In fact, it can mean exactly the opposite in some applications. I look at the CCS, KV100, NOACK, and HTHS. The actual composition of the oil is equally as important. An oil that's all homopolymer PAO can have a very VI, but make a terrible engine oil.


Where to find HTHS data? A number of lube vendors are limiting access to data sheets now. They are only required by law to provide a safety data sheet.

Re: Of 0w-20 oils, which have highest VI [Re: Bill_W] #5446933 06/05/20 01:41 PM
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HTHS data is the most important data point in my buying decisions. Most companies don't publish this data and they are crossed off my "to buy" list. Seems Mobil1 has recently gone this route too. I was very disappointed when PQIA dropped HTHS from their reports several years ago.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Of 0w-20 oils, which have highest VI [Re: ka9mnx] #5446938 06/05/20 01:43 PM
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Originally Posted by ka9mnx
HTHS data is the most important data point in my buying decisions. Most companies don't publish this data and they are crossed off my "to buy" list. Seems Mobil1 has recently gone this route too. I was very disappointed when PQIA dropped HTHS from their reports several years ago.

Go by grade then, or approvals. You know what the minimum HTHS is of a Mercedes-Benz 229.5 oil is for example, or an A3/B4 oil. That's why approvals and specifications are more important than PDS. I wouldn't "cross off" an oil that has an approval which dictates a specific HTHS.


1994 BMW 530i, 253K
1996 Honda Accord, 289K
1999 Toyota Sienna, 437K
2000 Toyota ECHO, 290K
Re: Of 0w-20 oils, which have highest VI [Re: kschachn] #5446980 06/05/20 02:38 PM
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ka9mnx Offline
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Well I agree on that. My old vehicles don't have approvals or outdated approvals. Spec oil for the F150 and 4Runner are no longer available (SG and SH) so I guess I'm not running approved oils in those vehicles.
I do go by grade though and the F150 likes the proper grade with HTHS nearing the upper limit (ACEA A3). Fuel economy oils tend to stay towards the lower HTHS limits. I've given up on chasing oil for my vehicles and use the grade, PDS and price for my decisions. I don't think it really matters in my case.


2005 Ranger 3.0 - SuperTech Syn 0w-20/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
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