Is There an Oil Viscosity Lower Than 0W?

[john1944]

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Is There an Oil Viscosity Lower Than 0W?

Answer:
Yes, but currently the SAE J300 viscosity specification does not define an oil below 0W. The limiting factor for such an oil would be the availability of base oil to accomplish this viscosity. Such an oil would have a cranking viscosity below -35°C and pumping viscosity below -40°C. That’s pretty cold!! Brrrrrrr.

 

[Indydriver]

Yes, it's called Hoppes #9.

 

[Drew99GT]

You can't divide by 0!

 

[Merkava_4]

-5W-20

 

[Stelth]

Originally Posted By: Indydriver
Yes, it's called Hoppes #9.


Ha!

 

[OVERKILL]

Originally Posted By: Merkava_4
-5W-20


LMAO!!!

-15w40!

 

[HerrStig]

I wonder what the rating was on the stuff the Germans used in their tanks during the Russian winter? Maybe that will be the next "GC".

 

[OVERKILL]

Originally Posted By: HerrStig
I wonder what the rating was on the stuff the Germans used in their tanks during the Russian winter? Maybe that will be the next "GC".


That was ReichW40

 

[Mitch Alsup]

Answer: No, but there will be in the short future.

 

[skyship]

Originally Posted By: OVERK1LL
Originally Posted By: HerrStig
I wonder what the rating was on the stuff the Germans used in their tanks during the Russian winter? Maybe that will be the next "GC".


That was ReichW40


The Germans had a different oil numbering system and used the infamous WW2 tank oil, a simple blend of different countries but then historians called their new fully synthetic 1.939/45

 

[uart]

Originally Posted By: HerrStig
I wonder what the rating was on the stuff the Germans used in their tanks during the Russian winter? Maybe that will be the next "GC".

I thought it was because their oils couldn't handle those extreme temperatures that the Germans ultimately got their ar-ses kicked in Russia. It would be more interesting to know what the Russian tanks were using.

 

[uart]

Originally Posted By: Drew99GT
You can't divide by 0!


Actually you can divide by 0! (zero factorial), but you can't divide by 0.

 

[Clevy]

Originally Posted By: uart
Originally Posted By: HerrStig
I wonder what the rating was on the stuff the Germans used in their tanks during the Russian winter? Maybe that will be the next "GC".

I thought it was because their oils couldn't handle those extreme temperatures that the Germans ultimately got their ar-ses kicked in Russia. It would be more interesting to know what the Russian tanks were using.


Ha. The russians were using the first batch of g-oil made from the only plentiful fat available,the Germans.
Maybe?.........

So what's the verdict then. There is or isn't oil thinner than 0w?

 

[RiceCake]

(square_root(-1))W-20

Because like anything below 0 weight oil,
Its an imaginary number

Edit: Guess this forum hates my use of tricky square-root-characters...`touche...

 

[fdcg27]

Originally Posted By: Drew99GT
You can't divide by 0!


You can come pretty close.
This would be expressed as the limit as h approaches zero.

 

[HerrStig]

The usual story is Dieter and the boys developed synthetic oil
to deal with the Russian winter, so they wouldn't have to build fires under the crankcases of the tanks to thaw them out. It might have been because they didn't have anything else to use. I'll have to check my BMW bike manual, maybe they have a recommended grade for "high speed winter operation while being pursued by angry Slavic armies".

 

[HerrStig]

Perhaps there is a corresponding summer grade for "High Speed
Strategic Withdrawals in Desert Conditions"

 

[TFB1]

By most definitions presented here, there is no such thing as below zero temps either...

Most certainly can be less than zero oil, the current antiquated system just doesn't account for it...

 

[G-MAN]

The answer to this question becomes simple when you realize that "0" is not a measure of viscosity.

 

[uart]

My guess is that someone wants to make a new specification that exceeds the current 0w spec then they wont use negative numbers like (-5)W15. Instead they'll make up a new designation, like 0EW15 for example, where the "E" would designate extend winter grade or something like that.