instead of reading their fluff find out the specs
amsoil 75-90 severe gear, rated up to 100,000 miles

btw mob1 flash point is 175 C vs 220 C quite a big diff for your diff.


[align=center]TYPICAL TECHNICAL PROPERTIES
revised as of 10/07[/align] [align=center]AMSOIL SEVERE GEAR® Synthetic Extreme Pressure (EP) Lubricant 75W-90 (SVG) [/align] Kinematic Viscosity @ 100°C, cSt (ASTM D-445) [align=center]16.7[/align] Kinematic Viscosity @ 40°C, cst (ASTM D-445) [align=center]109.1[/align] Viscosity Index (ASTM D-2270) [align=center]165[/align] Brookfield Viscosity, cP (150,000 Max) @-40°C [align=center]68,150[/align] Flash Point, °C (°F) (ASTM D-92) 150°C Min. [align=center]220 (428)[/align] Pour Point, °C (°F) (ASTM D-97) [align=center]-50 (-58)[/align] Copper Corrosion (ASTM D-130) 1b Max @ 121 °C (250°F) / 3hr [align=center]1b[/align] Falex Procedure B (ASTM D-3233) (failure load, lbf.) [align=center]2500[/align] Foam Stability (ASTM D-892) (20/50/20 maximum) [align=center]0/0/0






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Hey RamitOne, i'll be honest with you i saw the same chart on Mobil 1's website, and didn't post it, because to be honest with you again, i don't know what none of that $!%T stands for........I just know i like Mobil 1's synthetic oil...

 

what mob1 motor oil do you use?

 

heres an easy to read graph on one of (well my 2) the two most important tests on oil, Flashpoint and this one, the ball wear test

-

 

5W-30 Extended mileage. good for 15K Miles. but there"s no way i'll keep it in there that long.....probably change it out around 9K-10K miles...

 

be carefull what filter you use, a lot of filters are still designed for low mileage intervals. I use amsoil 25k mile oil and replace every 7500.

 

Funny, but i use Mobil 1 oil filters too.....i guess i should be a spokesman......

 

so do i have limited slip or not?

 

you dont.
did you get my skype?

 

The oil isn't the issue, it's the filter. I have just tried Royal Purple in the Jeep and with a good filter (I only use Mobil 1 or a Wix - but have read good things about the K&N, and I like the nut on the top, so I may try one next) and I'll extend my normal 3k change to 6k, which is the longest I'll trust ANY oil filter for...