Thin 0w20?

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The tendency for thin oils like 0w20, 0w16, 0w12 and 0w8 (which I dont think is even on the market) is more common now.

My Mazda 3 specs for 0w20.

Most 0w20 viscosity is around 8.6 at 100 degrees.

Is there any thinner 0w20? closer to a 0w16? Im curious about it.

Thanks!
 
Idemitsu's dexos1 ZEPRO 0W-20 comes in at 7.91cSt @ 100, which is one of the lower 20wts that comes to mind, which correct me if I'm wrong, could technically be considered a 16wt (based solely on KV) since the SAE requirements has a 16wt between 6.1 to <8.2 while 20wt is between 6.9 to <9.3.
 
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you would think it should not take too long for a 0W20 and some fuel dilution to be close to a 0W16 or a thinner 0W20.
 
Originally Posted by wolf_06
The tendency for thin oils like 0w20, 0w16, 0w12 and 0w8 (which I dont think is even on the market) is more common now.

My Mazda 3 specs for 0w20.

Most 0w20 viscosity is around 8.6 at 100 degrees.

Is there any thinner 0w20? closer to a 0w16? Im curious about it.

Thanks!



CORRECTION:

0w8 is ALREADY on the market

Motul;
https://www.ebay.co.uk/p/24036300274?iid=202816678216&chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=202816678216&targetid=876856823489&device=c&mktype=pla&googleloc=9046645&poi=&campaignid=9437834768&mkgroupid=95351417669&rlsatarget=aud-381667280803:pla-876856823489&abcId=1140486&merchantid=6995734&gclid=EAIaIQobChMIqP6g37Cc6AIVBLTtCh3knwiiEAQYASABEgKxZfD_BwE


Royal Purple;
https://www.ebay.co.uk/p/755804611?iid=133133884874&chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=133133884874&targetid=876739461293&device=c&mktype=pla&googleloc=9046645&poi=&campaignid=9437781746&mkgroupid=96108861576&rlsatarget=aud-381667280803:pla-876739461293&abcId=578896&merchantid=109943728&gclid=EAIaIQobChMIu_C5-7Cc6AIVSLTtCh2P4QqaEAQYAiABEgKr0vD_BwE


Honda own brand;
https://global.rakuten.com/en/store/indies-mc/item/ultra-next-20/
 
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Originally Posted by wolf_06
The tendency for thin oils like 0w20, 0w16, 0w12 and 0w8 (which I dont think is even on the market) is more common now.

My Mazda 3 specs for 0w20.

Most 0w20 viscosity is around 8.6 at 100 degrees.

Is there any thinner 0w20? closer to a 0w16? Im curious about it.

Thanks!

While it might sound contrary to common sense, for a given HTHS, the higher the KV100, the thinner the oil is. Therefore, for a given HTHS, if you're looking for a thicker oil, choose the oil with the lowest KV100.

Why? This is because for a given HTHS, the higher the KV100, the more the VII content is, which means the thinner the base oil is. As a result the viscosity index will be higher and the HTHS at lower temperatures (lower than 150 °C) will be lower. Moreover, there will be more VII shear, and the HTHS will be lower at higher shear rates (higher than 1,000,000 1/second), like in the valvetrain.

Again, if you want a "thick" 0W-20, look for one with the lowest KV100 and highest HTHS, not for one with a high KV100.

An example is TGMO 0W-20. While it has KV100 ~ 9 cSt, it's the thinnest 0W-20 out there due to its very high VII content. The high VII content raises the KV100, but what matters is the dynamic viscosity under shear, which will be lower under more conditions thanks to the high VII content.
 
Originally Posted by OilUzer
I recall the days that the high vi tgmo 0W20 was the oil from the heavens ...

For the best fuel economy, it's still the oil from Heaven, as it has an ultra-high viscosity index. However, the OP is not asking which 0W-20 has the best fuel economy -- he is asking which 0W-20 is the thickest.
 
Originally Posted by Olas
If you want a thin 20, would you consider a thick sae16? one stops where the next one begins


Good point! I did the reverse:

I have a 0W20 (om spec) car ...
Decided to use a thicker 0W20 (as oppose to a thinner 0W20).
Applied your logic (in the other direction) and decided to try a thin 0W30 instead.
Later I figured i should not worry about thick vs. thin W30's.
Finally settled with W30's with "healthier" hths.
I guess I could have easily gone the 0W16 route ...
 
Subaru 0w20 ( Idemitsu) has a low KV100. But its noisy when hot in the engine. Real noisy.

The Motul 508 in the VW has a low KV100 and a low HTHS.

It too was too noisy and caused poor performance.

If you are driving at 1200 - 1700 rpm max and light throttle this might be adequate.

But who does that?

Also The engine was eating this light 0W20 stuff, so I added a 1/2 litre of M1 0W40 porsche juice - that I was going to run in my generator last winter

All is better, for now.
 
Somebody here at BITOG (maybe Gokhan) showed a chart a week ago that broke-down all kinds of measurement numbers in different viscosities - with different oils. I thought I saved the link, but can't seem to find it. That chart showed the viscosity numbers for numerous oils in different weights.

Hopefully whoever provided that chart will read this thread.
 
Any where else, I often read that high VI's and VII's was always a bad thing. Now all of a sudden, it is good for TGMO. Which one is it?
 
Originally Posted by ARCOgraphite
Subaru 0w20 ( Idemitsu) has a low KV100. But its noisy when hot in the engine. Real noisy.


Yours is the older 2.0 motor though, before Subaru introduced the direct injection 2.0 engine with more than 80% new parts compared to the older generation. The new FB20D are quieter. The newer models have more sound insulation too.

It was not clear which of your two cars was consuming oil, the Crosstrek or the VW. From the context I get the impression it is the Volks.
 
I don't understand the fascination to keep going thinner and thinner. Using 0W20-10W30 I haven't noticed any real world fuel economy. Are car manufactures just trying to push the envelope? Imo,you don't want too thin nor too thick. You want the perfect equilibrium between performance and protection.
 
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