Rear end lubes Amsoil/NeoSyn/M1/RL. Best?

Jeff1111 · Jun 4, 2004

I have read that these lubes are among the best... I am considering changing the rear diff. fluid on my new Nissan Titan due to some new owners having major problems when towing heavy loads 8000#+. I am looking for the best protection with changes at 50,000mi or so. Price is not really a concern as the diff. takes only 68 oz. Which would be best?? Note: If anyone has any opinions on the NEO products, it would be appreciated; as they are seldom reviewed and a "search" on the site offers little info...

Thanks!

slalom44 · Jun 4, 2004

You may want to check out LE-607, made by Lubrication Engineers. This is highly regarded at a Honda S2000 website. It's a GL-5 rated 90W gear lube that is compatible with limited slip differentials. That is, if your diff can take a 90W fluid.

therion · Jun 4, 2004

the Amsoil stuff looks to be the best and it is what i use in my van. They recommend no change interval under "normal" driving conditions.

sbc350gearhead · Jun 4, 2004

I think that the schaeffer's supreme blend would work very well in a truck application. RP and RL would get my vote if a limited slip is involved. I am sure that amsoil would work just as well, but you may need to add a limited slip additive if applicable. I am not sure on the S2K stuff.

tdi-rick · Jun 4, 2004

I'll put in my 2 bob's worth for NEO HD and RHD fluids. They are both LSD fluids, with the RHD being basically a race fluid with a superior load/torque rating.

I believe it is still the only fluid formally recommended by Xtrac, suppliers of transmissions, diffs and gears to most F1 and WRC teams.

Realistically, any of the listed lubes would be very good.

If the diff is similar in any way to the Nissan Patrol diff used here in Oz, a 75 or 80w-140 is the recommended lube, and I'm actually using Castrol SAF-XA, a 75w-140 GL-5 full synthetic LSD oil. It has a very good reputation here, and is used in a lot of race vehicles. It's also a **** of a lot cheaper than NEO,

although I still use NEO greases and their Keep Cool coolant additive, but if I still had a race car, I'd be using NEO gear oil.

Rick

JohnBrowning · Jun 4, 2004

I would go with Redline or Royal Purple. Redline is a proven peoduct line for gear lubes!!! Royal Purple is not aproven product in my eyes but it does have some nice spec.'s like Timken load =100LBs reguardless of viscosity. I have RP in my transmission ans so far I really like.

So to recap my first choice is Redline from myoilshop.com ! My second choice is Royal Purple.

biodiesel · Jun 5, 2004

I'll throw a second in for the Lubrication Engineers LE607.

If your differential calls for a straight 90W then this fluid is far better, IMO, than any 75W90 or 80W90 differential fluid you could use as a substitute. I've used Mobil 1, Redline, and AMSOIL 75W-90 in my diff and the LE607 is noticeably better in feel and function.

par · Jun 6, 2004

Is that Lubrication Engineers LE607 a synthetic??

If not, I can't see how is would ourperform a synthetic 75w-90, overall.

I can only imagine what the LE607 looks like on a frigid morning!

Granted that it may be better on a real hot and loaded run, but that much better?

Dick in Falls Church · Jun 7, 2004

To the best of my knowledge, LE products are Group I with a beefed up additive package.
Unlikely to outpeform any good synthetic.

biodiesel · Jun 7, 2004

quote:

Originally posted by par:
Is that Lubrication Engineers LE607 a synthetic??

If not, I can't see how is would ourperform a synthetic 75w-90, overall.

I can only imagine what the LE607 looks like on a frigid morning!

Granted that it may be better on a real hot and loaded run, but that much better?

Yes...you have a point. If I lived in the Northern States and/or Canada I would definitely consider another option because of the pour point; however, the properties this diff fluid are exhibiting are far greater, in many areas, than a lot of the 75W90 options on the market and in a warm environment like Texas I'll continue to use it.

Here's a good write up presenting its characteristics:

http://forums.s2ki.com/forums/showthread.php?s=&threadid=185775

[ June 08, 2004, 11:12 AM: Message edited by: biodiesel ]

Ken2 · Jun 8, 2004

Shouldn't tow 8000+# with any half-ton pickup. Expect problems. The so-called Tow Ratings are created by the marketing departments of the truck makers. They all lie.

What is the Gross Combined Weight Rating of your Titan? That's the max allowable weight of the loaded truck and loaded trailer. Most reach the GCWR well before they reach the Tow Rating.

Ken

[ June 08, 2004, 03:46 PM: Message edited by: Ken2 ]

par · Jun 8, 2004

Amsoils versus LE-607 discussion:

http://www.technilube.com/sections/comps/S2K_vs_LE.htm

I think that I'll stay with my synthetics.

Jeff1111 · Jun 8, 2004

Thanks for the replies! I am tending toward the Redline presently. The GCWR for the truck is 14,800, so towing 8000# should not really be a problem; assuming it meets the specs...

biodiesel · Jun 8, 2004

quote:

Originally posted by par:
Amsoils versus LE-607 discussion:

http://www.technilube.com/sections/comps/S2K_vs_LE.htm

I think that I'll stay with my synthetics.

LOL

I'm sorry but I'd rather get my information from unbiased sources. I was wondering exactly where I had ended up until I clicked "home" at the bottom and it took my to someone's personal AMSOIL marketing/diatribe website.

Thanks so much for that invaluable information.

I especially love the 22 mins. part. ROTFLMAO

I suppose from that one piece of information I am to infer that Honda engineers don't know what they are talking about when they recommend a straight 90W for the S2000 differential. I guess each time I got out now I'll have to drive around real slow for 22 mins. before my diff is ready for action.

[ June 08, 2004, 10:03 PM: Message edited by: biodiesel ]

therion · Jun 8, 2004

quote:

Originally posted by biodiesel:

quote:

Originally posted by par:
Amsoils versus LE-607 discussion:

http://www.technilube.com/sections/comps/S2K_vs_LE.htm

I think that I'll stay with my synthetics.

Click to expand...

LOL

I'm sorry but I'd rather get my information from unbiased sources. I was wondering exactly where I had ended up until I clicked "home" at the bottom and it took my to someone's personal AMSOIL marketing/diatribe website.

Thanks so much for that invaluable information.

I especially love the 22 mins. part. ROTFLMAO

I suppose from that one piece of information I am to infer that Honda engineers don't know what they are talking about when they recommend a straight 90W for the S2000 differential. I guess each time I got out now I'll have to drive around real slow for 22 mins. before my diff is ready for action.

ROFL, After reading that I am dissapointed by some of the Amsoil dealers!

Check this out at the top of the page, you can automatically close your browser after you see one of these next time LOL

"The following is a discussion Direct Jobber Dan Watson had with members of an online forum when the debate came up that Lubrication Engineers' 607 Straight 90 Weight Petroleum Gear Lube could outperform Amsoil's Series 2000 75W-90 Group IV, PAO based Synthetic"

[ June 08, 2004, 10:44 PM: Message edited by: therion ]

par · Jun 8, 2004

Chill!

It's a discussion board not gospel. Everybody has their opinion. I imagine the folk from Amsoil say good things about Amsoil, the folk from Neo say good things about Neo, the folk from Royal Purple ....

I personally do not like the inability of a lubricant to freely flow at startup and/or low temperatures since this is, in MY opinion, the most critical time of a mechanical device for wear. I'm not that concerned about the lubrication protection at high loads since I believe any top shelf gear oil is capable of doing the job.

biodiesel · Jun 9, 2004

quote:

Originally posted by **** in Falls Church:
The LE guy in the discussion group now works for AMSOIL. Allegedly, it seems that some of the data he was given by the LE home office was "skewed". So I guess by now he really is biased!!

Money talks...what more can I say?

Dick in Falls Church · Jun 9, 2004

>>>I'm sorry but I'd rather get my information from unbiased sources. I was wondering exactly where I had ended up until I clicked "home" at the bottom and it took my to someone's personal AMSOIL marketing/diatribe website.

The LE guy in the discussion group now works for AMSOIL. Allegedly, it seems that some of the data he was given by the LE home office was "skewed". So I guess by now he really is biased!!

Seth_TJ · Oct 24, 2004

I've had good luck with 75w90ns Redline in my Dana 35c and Dana 30 on my Jeep so far. I am going to UOA the oil in the rear end. I think I may be having some trouble, doubt if it is oil related though. I will be finding out though here shortly.

Jeep recommended a 80w90 but I went with a 75w90. Didn't seem to make any difference, I chose Redline over Mobil 1 because it was cheaper (even mailed to me) and the Amsoil their marketing is so pushy I just didn't go for it. I know I don't need their "SEVERE" gear line either so... I chose RL.

Going over Jeeps recommendations they wanted a 80W-90 GL-5 for normal use or a 75W-140 when towing. Well I towed probably 400mi round trip one day with an almost 1000lb load in the summer (jetski) and then through the summer I towed it about 12 times to lake which is 50 mins one way.

And I have a gear driven limited slip, which doesn't require any modifiers

Road Rage · Oct 24, 2004

quote:

Originally posted by **** in Falls Church:
To the best of my knowledge, LE products are Group I with a beefed up additive package.
Unlikely to outpeform any good synthetic.

This is completely incorrect. They formulate with a variety of Grades of mineral oils, but mostly GII mid-continent paraffinics, which is one of about 30K variations of parafinnics, and considered one of the best. Their 8130 has a small amount of GII and a PAO - their research has indicated that the GII's actually allow their proprietary additives to work at lower temps - that is a good thing.

Synoils may not always outperform a mineral oil - it depends on the application, obviously. LE-607 is a GL-5 90w with at least 3X the load capacity of any synoil including Amsoil's or Red Line's. It uses a proprietary colloid additive of alumunium magnesium silicate, which chemically (and perhaps mechanically) bonds to the metal. At boundary lubrication of hypoid (sliding) gears, this can make for tremendous reserve protection. In the S2000 (where I made the recommendation), it is the same diff as the Miata, with shot-peened gears at least, but in an engine with much more power. Shock load protection is paramount, as well as maintaining the proper film at high temp. Since Honda only recommends a 90w, I and many others will not use anything else, esp for track or strip use, and the LE-607 we analyzed in the lab performed terrifically. It even had a PP of -11 deg F, much lower than other 90w's. It is still not a winter use fluid for arctic use, obviously.

Rear end lubes Amsoil/NeoSyn/M1/RL. Best?

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