Just Looked @ AMsoils Gear Lube Results??????WOW

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JohnBrowning

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I can honestly say that I have arrived at most of the same conclusions from trial and error as their test resutls with a few exceptions. In my experince Redline has always worked the best in my experince in actual field usage and observation. I also have never had any isues with Mobil-1 just never been blown away by it either though.

I have to say that in all the years I have been turning a wrench from 1979 as a kid all the way up to 2008 I have vever seen a gear lube come out of anything I owned or regularly serviced that was anything other then identical in color to what it iwas when it went in. Does not matter if it is a diff. a transmission or transfercase all have come out the same color they where when they went in. THey must have beat the snoot out of them to get them to turn color like that!!!!

I have always used theamount of wear metal on my magnetic dran plug,UOA and the shift feel to determine if I like a gear lube!What I found most interesting though was how many companies put out a product that channels that is not good at all!!!
 
Originally Posted By: JHZR2
so is this good or bad???

JMH

x2......
LOL.gif
 
I think he's trying to say Amsoil is a good product.

I've seen the white paper myself and Amsoil pretty much smoked the majority of the competition. And there was a lot of competition.

You can find the results on Amsoils website.
 
Oh I like most of AMsoils products and Redlines and Mobil-1!!!! I just could not believe how many gear lubes they managed to turn black! In my entire life I have never seen black gear lube. That is just crazy!!! Channeling is bad but none of the oils I listed had any channeling problems.

ANyone else on here ever had gear lube come out black bareing a complete self destruction of a differential??? I have seen vechiles that had the same gearlube inthem for 10 years and even they did not have black or dark brown gear lube. I am just saying I think some of their testing does not reflect the real world environments we tend to see in passenger car and light duty truck.
 
My gearlubes in bevelgear and final rearend was completely black.
Also in haldex unit the fluid was black.

Car Volvo XC70 2.5T AWD MY 2003 with 70000km on the odometer.
 
I don't remember ever seeing an OEM fill that didn't come out black or grayish in color. There was usually sludge on the drain plug too, along with the usual shavings.

The most recent disapointing gear oil performance in a rear diff was on my 2003 G35 though. It was serviced at 60K miles by an Infinity dealer with an unknown gear oil (I suspect 80W-90 Castrol). At 70K, on a whim, I asked my local mechanic to pull the drain plug so I could re-fill it with LE 607. The oil was terribly black with sludge on the drain plug. There wasn't any metal on the plug though.

I agree with the AMSOIL report that there are lots of poor performers out there. When you combine that with low volume capacity of gear oil in some differentials, it's a bad combination. Choosing a quality fluid is a no-brainer IMO. So is shortening your OCI as well. My OCI interval now for a 2000 Tundra (3.1 qt) is 30K, my 2003 G35 (1.5 qt) is 15K, and my 2004 S2000 (0.82 qt) is 10K.
 
In my 87 Volvo I didn't change the rear OEM fluid for 10 years. It was black as coal when it came out. I filled with Redline and changed it every other year. The first drain was as black as the original fluid. The next fill came out a lot cleaner. The last time I drained it about two years ago it was almost as clear as it went in. I'm not changing the present fluid until 50K miles have passed.
 
Originally Posted By: JohnBrowning

ANyone else on here ever had gear lube come out black bareing a complete self destruction of a differential??? I have seen vechiles that had the same gearlube inthem for 10 years and even they did not have black or dark brown gear lube. I am just saying I think some of their testing does not reflect the real world environments we tend to see in passenger car and light duty truck.


There was a thread and a set of pictures on an MB forum, where a member with >>250k on his MB 300D changed over to M1 diff oil. He took the cover off to show inside too. The M1 came in clean, came out black. The insides of the diff started dirty/black, ended up with fresh/bare metal after some use.

It sure cleaned up the junk that the dino diff oil didnt...

JMH
 
Originally Posted By: INDYMAC
I don't remember ever seeing an OEM fill that didn't come out black or grayish in color. There was usually sludge on the drain plug too, along with the usual shavings. ........


Same here. When I drained the factory fill on my Subaru rear diff at 7000 miles, it was black as tar.
 
When I changed out the factory differential fill in my Nissan pickup at 100,000 miles, the stuff looked like I had opened a fresh can of high-gloss black latex paint and dumped it in the catch pan.

Strangely, though, it was the SMELL of that old fluid that I'll never forget. It smelled like a putrid combination of burning flesh and rotten eggs. And once you got some on your skin, you had to wait for it to WEAR off---scrubbing was pointless.

I now change my diff fluid every 2 years/24k.
 
I just changed my VW 02m fluid today. After 78k miles it came out very dark, but clean. Used Amsoil. No difference in feel. We'll see after I drive it a bit I guess.

Does anyone know who makes the factory VW gear oil? They claim it's good for life. I would never do that though.
 
Most Chevy 1/2 ton trucks that I worked on back in the late 90's would look like molasses as they drained. Usually about 80k on the original factory fill would make the fluid disgusting. Tons of ferrous on the magnets too. The smell was wonderful!! Oh yeah and nuskool when an OEM says "good for life" their definition of "life" and ours are a little different. Planned obsolescence is a car manufacturer's credo...just ask General motors about their one piece hub bearing assemblies with a lifetime lubricant!
 
INDYMAC-

We have an '04 G35 whose differential fluid we changed at 25k miles. We put in Amsoil Severe Gear Oil and I noticed that the car seemed to drive and accelerate "lighter" with less drag. I highly recommend it.
 
Last edited:
After driving it for a few days after dumping the old and putting in Amsoil I've decided I would have to agree with the last post. Shifting feels the same, but it somehow seems smoother. Like the gears are "cushioned" better
 
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