Motor oil VS. gear oil flow

[FourbangerYJ]

I was wondering if there was a chart or something to show how motor oil and gear oil share flow rates.
I was told that 10-30 motor oil flows about the same as 75-90 gear oil.Any truth in this?
What about the other weights of motor oil how do they compare to gear oil?

 

[Pablo]

Originally Posted By: FourbangerYJ
I was wondering if there was a chart or something to show how motor oil and gear oil share flow rates.
I was told that 10-30 motor oil flows about the same as 75-90 gear oil.Any truth in this?
What about the other weights of motor oil how do they compare to gear oil?


Easy pie. First of all new SAE 90 is closer to a SAE 40, not SAE 30......in the simplest of terms. But it's whacked to speak in those terms. Most common language is cSt @ 100°C. If these don't make sense, get back at me.

http://www.infineum.com/information/viscosity.html
http://www.lubrizol.com/products/automotive-gear-oil/J306.asp

 

[tom slick]

This chart will help also

http://www.bobistheoilguy.com/visc.html

 

[FourbangerYJ]

Thanks guy's. This sorta makes sense. I'll review the info.

 

[Zaedock]

Hey FourbangerYJ, is your Heep modified at all? Good to see another 4 popper Jeeper here.

 

[tom slick]

Originally Posted By: FourbangerYJ
Thanks guy's. This sorta makes sense. I'll review the info.


gear oil and motor oil are on different scales which make it confusing, sorta like degrees Celsius and Fahrenheit . pay attention to the ISO scale which is only based on viscosity

 

[FourbangerYJ]

Originally Posted By: Zaedock
Hey FourbangerYJ, is your Heep modified at all? Good to see another 4 popper Jeeper here.



Yes it is. http://www.4bangerjp.com/forums/ This is a great place to hang out if you like the 4 cyl stuff. I have a build thread there.

 

[FourbangerYJ]

Originally Posted By: tom slick
Originally Posted By: FourbangerYJ
Thanks guy's. This sorta makes sense. I'll review the info.


gear oil and motor oil are on different scales which make it confusing, sorta like degrees Celsius and Fahrenheit . pay attention to the ISO scale which is only based on viscosity


That makes sense. THANKS!

 

[jldcol]

Grease and oil also act differently in oil its the lube and carries other needed adds, grease the oil there is a carrier for the lube and adds. Gears slower and more pressure on them need something thicker/sticker to cope and stay on the wear surfaces.

 

[Pablo]

Not sure what you just wrote.

 

[jldcol]

If me you not sure of maybe I confuse grease with gear oil. I thought grease is soilds that are the intended functional components and the liquid is only needed to make it a paste like substance. In oils, the base oil is the lubricant and the solid adds are somewhat secondary.