Valvoline vs. Supertech 75w140 Gear Lube

[IndyFan]

I am getting ready to put new armored differential covers on my Gladiator. It has electric lockers, so no need for LS additive, which the Valvoline contains.

So what would the hive do? Valvoline is $15.50 a quart and Supertech is $13.88 a quart.

So really the price difference is no issue. So here is why I ask....The LS additive. I´ve read most places that it does not hurt a thing. But I cannot help but wonder if the Supertech gear lube might have an advantage not having it?

Chime in! I am leaning toward the Valvoline because I imagine it is a better product. But I also ran Supertech syn gear lube for much of the life of my 2008 Jeep Wrangler Rubicon in both ends and when I sold it at 193,000 miles, the rings/pinions looked new and the lockers still performed flawlessly. I would bet they´d last a million miles with 30k OCI´s with that stuff.

I know I can´t go wrong with either. Love the bags, but I have an old Valvoline bag that I could refill with the Supertech, so no big deal there.

 

[Chris142]

I am sure both are fine but if given the option I would choose Valvoline as I feel it to be the better product.

 

[IndyFan]

Just saw they have Mobil 1 75w140 for $15.98 shipped, too. With LS additive.

 

[dnewton3]

As has been mentioned, any decent GL-5 is going to work fine.

If it were me, I'd run the ST; less expensive and a proven performer.

 

[DemoFly]

I'd buy whatever is in a squeezable bag tbh.

 

[BigShug681]

I just serviced the front and rear dif on my Xterra, the front called for a 80w90 and I used the Valvoline 75w90, the rear called for 75w90 but I ended up using the 75w140 instead since I couldn’t find any more qts of the 75w90, looks like the MPG will have to take one for the team again. Anyway chose the Valvoline for the simplicity of the squeeze pouch, absolutely love them makes service so much easier.

 

[4WD]

Used to be $100 to get free shipping (now $109) so I stocked up:

https://www.summitracing.com/parts/...1390092850514&utm_content=GSAPI+5d4c9cc121695

 

[IndyFan]

Appreciate all the input! I went with the Valvoline because the local WM only had 1 quart of ST in stock. The bags are awesome, but like I said, I kept a couple empties in case I wanted to fill and use them to run ST, M1, or something else.

Iĺl be doing these diff covers sometime this week. I probably have 12k to 15k on the gear oil, anyway. I tend to change the rear lube out between 15k and 25k just because it is very easy to do. Front lube on this truck looked brand new when I changed it at 35-40k. It was the original factory fill. Not much stress up front. The first change on the rear, at the same mileage, looked good, but absolutely ready to change. Lots of metal on the drain magnet.

I tow my boat quite a bit, so 15-25k is where I am comfortable. I think the manual says around 30k for severe service.

 

[D60]

Appreciate all the input! I went with the Valvoline because the local WM only had 1 quart of ST in stock. The bags are awesome, but like I said, I kept a couple empties in case I wanted to fill and use them to run ST, M1, or something else.

Iĺl be doing these diff covers sometime this week. I probably have 12k to 15k on the gear oil, anyway. I tend to change the rear lube out between 15k and 25k just because it is very easy to do. Front lube on this truck looked brand new when I changed it at 35-40k. It was the original factory fill. Not much stress up front. The first change on the rear, at the same mileage, looked good, but absolutely ready to change. Lots of metal on the drain magnet.

I tow my boat quite a bit, so 15-25k is where I am comfortable. I think the manual says around 30k for severe service.

If you're doing gear oil that often, you're WAY overthinking this. Use any reputable brand name or house brand (ie Supertech, MasterPro etc)

Friction modifier is really good stuff. While there may be no technical benefit to having it where not needed, it would be virtually impossible for it to HURT anything. IOW, it may not help, but it cannot hurt.

That said, I would have used the ST if it were available. A dollar is a dollar....

 

[Escape08]

Won't hurt anything at all if you chose either one. Over the years I've used different brands on my 1984 Isuzu P/U. I changed gear lube/transmission fluid every 30K miles.

 

[SC Maintenance]

Valvoline did not fare the greatest in the 75W-90 test. Not that it was bad, just that I wouldn't pay a premium for it. I actually have been using it forever because its easy to source, but probably will not going forward.

Whether that transfers to 75W-140 who knows.

Thread 'Mega 75w-90 testing thread!'

Jan 15, 2024

@ford250 @SNWMBL @Impatient and maybe more (sorry, it’s been awhile!) contributed samples for this test.

We’ve imported the other 75w90 tests from my other thread here, and also add these 75w90s:
Shell Spirax
Subaru HP
Ultra Plus (cool clear bottle!)
AC Delco
Valvoline Synpower
Ravenol VSG
HPL non-CC Diff Life

Somehow, I misplaced the Motul Motylgear so that didn’t get submitted. Apologies. Lab also included foaming results, but I have not read the ASTM method yet to determine the pass/fail criteria. Looks like vsl= visual, and tr= trace. Other than that, here’s...

• SubieRubyRoo
• Replies: 114
• Forum: Gear, Transmission, Hydraulic oil analysis

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[goingplacesanddoingstuff]

Amsoil isn’t much more and performs better. I personally think it’s worth it to pay $10-20 more for lower diff temps, less wear, and longer life.