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Mega 75w90 testing thread!
- Thread starter SubieRubyRoo
- Start date
I run 75W-140 in my F150 and F350 and the Toyota Tacoma ,,, the 75W-140 in the Toyota is over kill but then over kill is underestimated.
Not sure how to really interpret the data. Can one put these in order, if possible?
You could, but your interpretation will likely be different than someone else’s, and because of different reasons. I should have the pour point and Brookfield data for the 6 newer oils soon.
But, back to the comparisons: there are differences especially in really cold temperatures, but unless you live in those temps there’s no point in prioritizing that. On the wear tests, if you never tow there are some really good low-load wear results; if you tow heavy those choices may change slightly.
As @dnewton3 has referenced before, a shortcut to finding a good gear oil without this data is to simply pick one off the SAE J2360 QPL list.
Thanks for the data! I currently have the amsoil svg 75w-90 in my e90 front and rear diffs. Maybe I'll try the HPL in my F36.
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Was the Valvoline listed on here the white bottle/blue label (conventional?) High Performance 75W-90 or the SynPower 75W-90. Looking at their packaging, both contain a limited slip additive.
If we need some results on SynPower, just bought 12qts to do some diff series on and could send in some to Blackstone for a VOA. Also have some Amalie 75W-90 (w/o LS additive) that I could send.
...had about a 1/4 of a quart of John Deere GL5 75W-90 that I could've sent in but I mixed it with 1/4 quart of the leftover Amalie I had left for the 54D mower gearbox (whoops!).
If we need some results on SynPower, just bought 12qts to do some diff series on and could send in some to Blackstone for a VOA. Also have some Amalie 75W-90 (w/o LS additive) that I could send.
...had about a 1/4 of a quart of John Deere GL5 75W-90 that I could've sent in but I mixed it with 1/4 quart of the leftover Amalie I had left for the 54D mower gearbox (whoops!).
Synpower
Great thread! Thanks
Will be ordering Severe Gear for my Outback soon.
Will be ordering Severe Gear for my Outback soon.
Still tuned ...
Still waiting on lab. As posted earlier, I asked a big favor from the lab for all this testing, so we’re at their mercy (grace?) awaiting results. Considering each oil had testing that amounted to at least 75x what each quart cost, a little wait isn’t that bad. In reality, there’s already plenty of data about the 11 gear oils in this thread for the 99% of people who live outside the Arctic Cirlce to make their decision.
Trust me, the board will get the data posted within minutes of when I receive it. I’m as eager to see the results as you are. Thanks for being patient
Trying to apply this info to my current situation.
Money has gotten tight, and rear diff on my Transit has gotten leaky. Only 82000 mi. In a semi-perfect world I would install an Eaton TruTrac Torsen rear diff, and use appropriate fluid ( no friction modifier, synthetic NOT preferred???). But must fix the leak, and replace the factory fill (82k), no Torsen this year.
Here are factors I considering.
Ford spec is75w85
Tall roof Transit van, near 10 ft tall, though only 7500 Gross weight (typical), but lots of aero drag
Most mileage is highway, but considerable off-road (10-15%)
Does anyone know how different Mobil 1 is from Mobil Delvac 1?
I may have to use a fluid a local shop will accept (or source). Lots of Valvoline lovers here, but I’m not…though for gear oil, not a hater; though not overly impressed with its performance in this shootout.
I really liked the Amsoil SvG, but considering I might be looking for only 12500-25000 mi solution before swap to Torsen, maybe it is overkill. As much as I like HPL, I can get Amsoil for less (though not near as cheap as Delvac),so for the moment will rule out HPL (at Torsen time, will reconsider).
It pisses me off that a year ago I would have done this myself, now, “old-man-back” makes me a target of shops (not just dealerstealers).
Money has gotten tight, and rear diff on my Transit has gotten leaky. Only 82000 mi. In a semi-perfect world I would install an Eaton TruTrac Torsen rear diff, and use appropriate fluid ( no friction modifier, synthetic NOT preferred???). But must fix the leak, and replace the factory fill (82k), no Torsen this year.
Here are factors I considering.
Ford spec is75w85
Tall roof Transit van, near 10 ft tall, though only 7500 Gross weight (typical), but lots of aero drag
Most mileage is highway, but considerable off-road (10-15%)
Does anyone know how different Mobil 1 is from Mobil Delvac 1?
I may have to use a fluid a local shop will accept (or source). Lots of Valvoline lovers here, but I’m not…though for gear oil, not a hater; though not overly impressed with its performance in this shootout.
I really liked the Amsoil SvG, but considering I might be looking for only 12500-25000 mi solution before swap to Torsen, maybe it is overkill. As much as I like HPL, I can get Amsoil for less (though not near as cheap as Delvac),so for the moment will rule out HPL (at Torsen time, will reconsider).
It pisses me off that a year ago I would have done this myself, now, “old-man-back” makes me a target of shops (not just dealerstealers).
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When you do the Torsen, you could capture the Amsoil in a clean (new?) container and reuse it?
Or, on the other hand, think of it as a relative comparison. If Valvoline passed some of the most intensive tests available (multiple vehicles have to run 200k miles & then pass tests), think of how great the oils that performed objectively better really are?
Now you see the difference between $12 Synpower and $15 Amsoil/HPL… IMO Synpower is fine, but the “upgrades” are a no-brainer.
Yupper! 75W-140 in the rear diff of my 2021 Ram with 3.92 LS
Can I ask for concurrence (or not) with my interpretation of the original @SubieRubyRoo results, for use in Ford Transit 250 camper van (some off-road, no towing), and new-to-me older Subaru 6-cyl automatic with 2 diff’s which each take 75w90 (@80k, it’s time to see if the diffs still have factory fill).
Local Subaru indie shops love Motul.
If North Central TX temps for me will ALWAYS be above 0F, and almost always above 0C, is there any reason to choose the Motul over the Amsoil Severe Gear 75w90?
Pricewise, HPL up there, as are OEM Motorcraft 75w85 (yes, 75w85) and Subaru HPGO. Also Motul expensive. Except for coldest weather, I don’t see a downside to the Severe Gear 75w90 (I don’t think I need to pay shipping, and would buy short-term “subscription,” to get lower pricing). That said, @Pablo keeps pushing the 75w110 in these forums. I wonder if Amsoil “thinned down” the 75w90 to make room for the 75w110? Though Subie’s tests appear to be recent version of SVG.
Somewhat beneficial to use same fluid in both vehicles, unless good reason not to.
Local Subaru indie shops love Motul.
If North Central TX temps for me will ALWAYS be above 0F, and almost always above 0C, is there any reason to choose the Motul over the Amsoil Severe Gear 75w90?
Pricewise, HPL up there, as are OEM Motorcraft 75w85 (yes, 75w85) and Subaru HPGO. Also Motul expensive. Except for coldest weather, I don’t see a downside to the Severe Gear 75w90 (I don’t think I need to pay shipping, and would buy short-term “subscription,” to get lower pricing). That said, @Pablo keeps pushing the 75w110 in these forums. I wonder if Amsoil “thinned down” the 75w90 to make room for the 75w110? Though Subie’s tests appear to be recent version of SVG.
Somewhat beneficial to use same fluid in both vehicles, unless good reason not to.
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I recommend 75W-110, especially in differentials that are not much different than before the SAE J306 gear oil specification was changed.
You see Amsoil was not "thinned down" - they were the first to comply with the new specification almost 20 years ago. That change did split the old 90 range into two ranges 90 (13.5 cSt - 18.5 cSt) and the new 110 (18.5cSt - 24 cSt)
So recommendation on viscosity could be either - you are correct, air temperatures are important, as is usage, as is design.
In the Subie: https://www.amsoil.com/p/amsoil-severe-gear-75w-90-100-synthetic-gear-lube-svg/?zo=515729
In the Transit: https://www.amsoil.com/p/amsoil-severe-gear-75w-110-100-synthetic-gear-lube-svt/?zo=515729
Pablo’s sold a lot more Amsoil than I ever will, but that doesn’t mean I won’t recommend it… because it’s really good.
Now that I know everything I do, and have experienced it personally, I’ll break it down for you this way: the Gear 300 has a rabid fan base which isn’t necessarily wrong but it certainly doesn’t live up to all the hype. Yes it’s a good diff lube, but is fairly incorrigible in a MT in cold winter.
Amsoil has great test results across the board and decades of success across all kinds of hard applications. If you’re OK with paying for Motul, not only is Amsoil cheaper, but it’s likely even an upgrade in certain aspects.
HPL is good because it’s GL-4/GL-5 like the Motul as well, and puts up similar results across the board with Amsoil.
I do wish both HPL & Amsoil would get their gear oils on the J2360 QPL, but I know that’s a lot of added cost that would almost certainly have to get passed onto the consumer… and I’m OK if there’s no more price increases on things. We all know how those two brands perform
