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0W-8 is here: JASO GLV-1 #5443400 05/31/20 05:26 PM
Joined: Dec 2010
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Gokhan Offline OP
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They bench-tested the oils in a Toyota Prius/Prius Prime 2ZR-FXE engine (firing engine) to measure the fuel-economy improvement. They also dyno-tested the oils in a Nissan Rogue Sport MR20DD engine (motoring engine) running in a real vehicle.

"SAE 0W-8 high-moly oil demonstrated 0.5% fuel economy improvement over SAE 0W-16 organic friction modifier (OFM) oil."

How much of the improvement is coming from the SAE 8 and how much is coming from the high moly? It's obvious this is an apples to oranges comparison. We don't even know if SAE 0W-8 actually made the fuel economy worse by entering into the elastohydrodynamic-lubrication region in the bearings and increasing the boundary-lubrication friction in the cylinders and valvetrain. Obviously more transparency is needed, which is not being provided.



2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 65 mpg on regular gasoline, ~ 5,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5443411 05/31/20 05:39 PM
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ZeeOSix Offline
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Originally Posted by Gokhan
We don't even know if SAE 0W-8 actually made the fuel economy worse by entering into the elastohydrodynamic-lubrication region in the bearings and increasing the boundary-lubrication friction in the cylinders and valvetrain. Obviously more transparency is needed, which is not being provided.


Agreed ... and it would be interesting to see wear numbers along with the testing also. Could be that the high Moly is doing most of the work as the viscosity becomes lower and lower, and more metal-to-metal contact is increased from the diminishing MOFT. It was discussed many moons ago that these super thin viscosity oils will have to rely heavily on anti-friction/anti-wear additives because the MOFT his going to suffer and give way less metal-to-metal contact prevention headroom.

Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5443503 05/31/20 07:48 PM
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skyactiv Offline
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I think 0W8 is being developed by a company or employees who are trying to justify their existence.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 18' Elantra Sport 6 speed manual
The rude guy that points out reality


Re: 0W-8 is here: JASO GLV-1 [Re: skyactiv] #5443506 05/31/20 07:53 PM
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Marco620 Offline
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Originally Posted by skyactiv
I think 0W8 is being developed by a company or employees who are trying to justify their existence.


Agree! I want to see a factory engine with original timing chain intact after 200,000 miles. Its aint gonna happen. Long live the 30 wt!!!!!!!!


15' Civic r18, 342,000 mi M1 0w30(3qt)/Redline 5w30(1qt),Castrol CVT Fluid,Redline Si-1
Dog Whisperer! Honda/Acura nerd; detest ethanol,wind,"green" ,solar & vegan.


Re: 0W-8 is here: JASO GLV-1 [Re: ZeeOSix] #5443521 05/31/20 08:14 PM
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bulwnkl Offline
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Originally Posted by ZeeOSix
Originally Posted by Gokhan
We don't even know if SAE 0W-8 actually made the fuel economy worse by entering into the elastohydrodynamic-lubrication region in the bearings and increasing the boundary-lubrication friction in the cylinders and valvetrain. Obviously more transparency is needed, which is not being provided.


Agreed ... and it would be interesting to see wear numbers along with the testing also. Could be that the high Moly is doing most of the work as the viscosity becomes lower and lower, and more metal-to-metal contact is increased from the diminishing MOFT. It was discussed many moons ago that these super thin viscosity oils will have to rely heavily on anti-friction/anti-wear additives because the MOFT his going to suffer and give way less metal-to-metal contact prevention headroom.


Indeed. This has been a bother to me for some time: Multiple technologies are shifted at once, but results are presented as if to show that viscosity doesn't matter other than as a way to alter mpg. They may or may not be, but no one is generating or presenting the data to demonstrate that.


I use speech recognition frequently. Please excuse any consequent grammatical or typographical errors.
Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5443571 05/31/20 09:33 PM
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Dinoburner Offline
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I can wait.


77 Chev stepside 454 Casteroil syn
95 GMC 4wd mobil syn
2016 Equinox LTZ V6 dealer
Kubota L5030 T6
Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5443627 05/31/20 11:56 PM
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daves87rs Offline
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Not sure I can see it lasting long.....


2020 Chevrolet Trax LS
2019 Chevrolet Equinox LS
2006 Chevrolet Cobalt LS
2004 Chevrolet Cavalier (project)

Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5444509 06/02/20 09:17 AM
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Shannow Offline
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Best thread in ages...
Thanks for reinstilling my faith in BITOG...


If it's the truth....it can handle the pressure !!!
Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5444956 06/02/20 11:06 PM
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Gokhan Offline OP
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Here is some data. For some reason it doesn't have the 0W-16 high-moly (GE116) test oil, but it has both the 0W-8 high-moly (GE108A) and 0W-8 OFM (GE208) test oils against the 0W-16 OFM (GE216) test oil.

Automotive gasoline-engine oil standard (JASO M 364: 2019) -- annex to application manual

This is the application manual for JASO GLV-1.

Automotive gasoline-engine oil standard (JASO M 364: 2019) -- application manual


2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 65 mpg on regular gasoline, ~ 5,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
Re: 0W-8 is here: JASO GLV-1 [Re: Gokhan] #5453776 06/14/20 02:18 PM
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ka9mnx Offline
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Neither link loaded in my browser?


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: 0W-8 is here: JASO GLV-1 [Re: ka9mnx] #5453955 06/14/20 07:02 PM
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Gokhan Offline OP
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Originally Posted by ka9mnx
Neither link loaded in my browser?

They are PDF files. If your browser cannot open them directly, try right-clicking on the link and saving the file.


2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 65 mpg on regular gasoline, ~ 5,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
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