Mopar Gear Oil for rear Diff

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Originally Posted By: oilboy123
NHHEMI you can bash Amsoil's test all you want. But show me any other company that even comes close in their testing. They had the test done by a third party.
Like any testing it's not perfect but show me any other company that has a real test with enough guts to lay it all on the line.
All I hear is an echo.....I guess there is none?

All I know is that I feel confident I'm not getting ripped off by the MFGs that want to stick it to you. $11.75 for Amsoil and $20.94 for the Mopar that test 2nd to last out of 14 oils.
Three of those gear lubes were petroleum and cost less than$6 a qt, ouch.


The testing is from a company that has a history of making questionable or even false claims about the competitors products, and their own, first of all. 2nd, according to a couple of the companies I contacted about the WP's, that so called independant lab wasn't so independant. They had some kind of ties to Amsoil( true? - I would not doubt it but??? ).

Also, how do you explain such big differences between what Amsoil showed for test results and what the mfg's of the other products showed? I found a LOT of inconsistancies between the WP's results on RP for example and what RP posted for data. Are we to disbelieve all these other companies and just take what Amsoil says for the truth? I have seen them say false and misleading things before so why should I believe one thing in the WP's?

One of the big slams on 3 of the oils in the WP's( and RP was one )was failing the copper corrosion test. People were slamming them BIG TIME for that because Amsoil said they failed. Funny but RP says they passed it. TONS of people use RP in MT's & Diff's where that matters. If their product truly would cause problems we would have heard about it long before Amsoil told us. In the WP's they have a viscosity test result on RP( again - the ones I remember the most as it is my preferred brand )where they show it being way off the charts bad. When you look at the data RP gives it is almost identical to Amsoil's data. Who do you believe?

Just 2 examples off the top of my head. I actually posted the differences and questionable results about RP in one of the Amsoil WP threads if you want to go look and see another side of the story vs just believing the Amsoil "truth".

I am sorry if it offends you but I have seen Amsoil lie( about the Moly used in RP as an example ), try and mislead people( using fake look alike API starburst seals as an example ), and on and on. Are the WP's 100% false? probably not. Are they to be taken as 100% accurate? Not even close.
 
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I can say I found it very off myself. I would say RP is amsoils biggest threat in the gearlube catagory....so of course they wont fair so well.

Thats just another thing I love about redline, they let their product do the talking.
 
Originally Posted By: oilboy123
NHHEMI you can bash Amsoil's test all you want. But show me any other company that even comes close in their testing.


Amsoil controls what is submitted for testing and controls what gets published.

How do I know Amsoil didn't do their own testing on these products to find competitor batches that were a bit out of spec and then submit those batches for testing? It's just one possible scenario. How do I know Amsoil didn't produce an extra special batch of their own product for testing's sake? How do I know they didn't do both? Their tests don't always fall in the line with manufacturer's PDSs or the recent PQIA data, either.

I like Amsoil's products, but their white papers and bench tests are marketing material from a company trying to sell you a product, and should be taken as such.

Originally Posted By: DieselTech
I can say I found it very off myself. I would say RP is amsoils biggest threat in the gearlube catagory....so of course they wont fair so well.

Thats just another thing I love about redline, they let their product do the talking.


I agree
 
Well I guess what comes to mind is why is Amsoil not being sued? Since we live in a sue happy country you would think that someone would have sued them by now. This would totally prevent them from doing comparison test I would think.

Seems hard to believe with all the testing against competitors they would get away with all kinds of shenanigans. It just seems hard to believe it's all a conspiracy........

I guess I'm out numbered here so I must be incorrect? I must be to emotionally involved..........
 
Originally Posted By: oilboy123
Well I guess what comes to mind is why is Amsoil not being sued?


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Not everyone is sue happy, and not everyone likely wants to admit they sometimes produce a batch that is out of spec.
 
ATF+4 in the transfer case and transmission. You can go for another brand than Mopar, as long as it says ATF+4 on the bottle.

As for the differentials, 75W-140 synthetic both front and back. Well that's what my Liberty manual says along with my dad's 2000 Durango manual says for towing duty. Again you don't have to stick to Mopar, go with any 75W-140 synthetic gear lube brand you wish.
 
Originally Posted By: Ben99GT
Originally Posted By: oilboy123
Well I guess what comes to mind is why is Amsoil not being sued?


21.gif
Not everyone is sue happy, and not everyone likely wants to admit they sometimes produce a batch that is out of spec.


Ben dont get worked up over yet another amsoil dealer that believes everything they read or hear. I have dealt this stuff for a long time and I dont even believe that it's all that anymore. Most dealers themselves talk out there backsides and do amsoil more harm then good. All I have to say is if your an engineer at amsoil great tell us if not that means you were not there so you dont know anymore then the next guy.

All in all somebody is fudging numbers and Amsoil seems to be the only ones attacking the other companies.
 
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I changed out the differentials on my Ram 2500 and used M1 75w90 with good results last year, also did the transfer case with Castrol ATF+4. All worked well. No need to use expensive dealer fluids.
 
Plenty of UOA testing in this UOA/VOA section along with other online websites. You don't need to even need to read the Amsoil white paper.

Use any full synthetic in the rear-end. Stick with
When working an 'end, I usually recommend thicker than what the manufacturer recommends. Learn about your components and their weaknesses and adjust/upgrade/modify as needed.
 
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