Cost-no-object 75W-90 GL-5 for a differential?

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BTW, my last truck specced 75W140...and I lashed out and got RP...that was a mistake. Less than a year later, it "globbed" out black and...globby...did a couple of flushes with mineral LS90 to get it out, then put in Castrol...


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I put this in the wife's Captiva front to rear...

https://www.penriteoil.com.au/products/pro-gear-75w-90-full-syn

Gear shift is very good.


I tried this FWIW in a toyota high ace van. Shifting improved and it did run along better, but I have a feeling that the old oil was well past it's service life.

https://www.nulon.com.au/products/gear-a...d-transaxle-oil

The Penrite gear oil looks good as well. They tell you about not adding any thing to it in fear of it degrading it. I wonder how stable it is? You might have to run a very short service OCI to flush out old unknown residual oil.

Very disconcerting the RP incident... I have used Nulon in a Ford BA Falcon: https://www.nulon.com.au/products/gear-a...ifferential-oil with noticeable improvement like the lube in the Hi-ace van.

Like all things lube it would be nice to have a brand/type V's brand/type destructive comparison test, to help quantify things, otherwise it just the "belief system" of selection over specific industry standards and advertising "guff".
Keeping an eye on this forum looking for the "good oil" As it stands the Nulon product is at the front of the cue ATM based on prior experience, I have used a lot of Castrol and Shell products in the past too.

Looking at changing diff and trans in the Paj and box/diff in the Suzuki Swift. I'm thinking Semi syn for both.
 
Originally Posted By: 2dogs
No one mentioned it so I will. Installed Schaeffers 75W-90 in my Subaru a few months ago. No strange noises and everything seems fine. Sure has a lot of certifications. Is it better than the rest? I'm not qualified to say...


That's the gear oil I use in my Kia Sportage and am very happy with it. Shaeffers sure has quite a few certifications and that's re-assuring too.
I also considered Delvac but couldn't find it in smaller than gallon bottles.

OP wanted 'money-no-object' oil - so he should shop based on highest price rather than oil quality
laugh.gif
 
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Originally Posted By: dubber09
Originally Posted By: 2dogs
No one mentioned it so I will. Installed Schaeffers 75W-90 in my Subaru a few months ago. No strange noises and everything seems fine. Sure has a lot of certifications. Is it better than the rest? I'm not qualified to say...


That's the gear oil I use in my Kia Sportage and am very happy with it. Shaeffers sure has quite a few certifications and that's re-assuring too.
I also considered Delvac but couldn't find it in smaller than gallon bottles.

Schaeffer says their 75W-90 "meets and exceeds" a lot of specs, but it carries zero certifications.
 
Originally Posted By: dubber09
Meets and exceeds - is good enough for me, certifications cost money and that would affect oil price.

Then how is Delvac one of the least expensive, most certified gear oils?

Seriously, it's a no brainier if you need a GL-5.
 
Originally Posted By: dubber09
My guess is - volume.

Delvac is an excellent gear oil, that's what I'd use if could find it in quart or 1L bottles.

It's cheap enough by the gallon! I just bought a case of 3 and have 9 quarts sitting around lol. It ain't going bad on my shelf.
 
Originally Posted By: dubber09
Meets and exceeds - is good enough for me, certifications cost money and that would affect oil price.

No problem. Just don't say it's one thing when it's the other.
wink.gif
 
Originally Posted By: dubber09
Meets and exceeds - is good enough for me, certifications cost money and that would affect oil price.

It's the testing that costs money.

I've asked Schaeffers and Amsoil reps on this site to tell us what they use to make that statement...they keep promising to get back to me but never deliver.

If (and I'm not saying that it is), they do a "4 ball" on a competitors certified oil, then beat it...that's bunk.

But if you don't know WHAT tests they do, how is it good enough ?
 
Originally Posted By: Shannow


If (and I'm not saying that it is), they do a "4 ball" on a competitors certified oil, then beat it...that's bunk.

But if you don't know WHAT tests they do, how is it good enough ?




Tests smests. These boutique oils are race proven. Word of mouth stuff.
 
Originally Posted By: turtlevette
Tests smests. These boutique oils are race proven. Word of mouth stuff.


Well shouldn't that be the only "specification" that they claim ?
 
Originally Posted By: Shannow
Originally Posted By: turtlevette
Tests smests. These boutique oils are race proven. Word of mouth stuff.


Well shouldn't that be the only "specification" that they claim ?




Of course salesmen are going to lie. Don't you have a bunch of them visiting your plant.

I did. Then when I'm on the vender side, my sales guys want me to back up their lies.
 
But we had a poster who was satisfied with statements from the manufacturers "meeting or exceeding" wide ranging, industry tests.

So on what technical basis would one accept these "lies" as being worthy of your dollar...

Are you saying that the fact that they exist, and have uses in racing is proof enough...?

What about Lucas oil stabiliser ?

Racers use it...lots...
 
Originally Posted By: Shannow
But we had a poster who was satisfied with statements from the manufacturers "meeting or exceeding" wide ranging, industry tests.

So on what technical basis would one accept these "lies" as being worthy of your dollar...

Are you saying that the fact that they exist, and have uses in racing is proof enough...?

What about Lucas oil stabiliser ?

Racers use it...lots...


Yep, what wins on Sunday sells on Monday. Only geeks look at certifications, specs and tests.

You really think Mobil 1 is better than redline because they've spent 100 million on testing?
 
For example, I'm having a problem with my noisy Borg warner transmission that shifts poorly and has a lot of metal mud on the magnet.

Should I

1. Look through all the specs and tests of gl4 and gl5 oils?

2. Research the internet to see what works.
 
Originally Posted By: Shannow
But we had a poster who was satisfied with statements from the manufacturers "meeting or exceeding" wide ranging, industry tests.

So on what technical basis would one accept these "lies" as being worthy of your dollar...

Are you saying that the fact that they exist, and have uses in racing is proof enough...?

What about Lucas oil stabiliser ?

Racers use it...lots...


Right, and I use and will keep using MaxLife ATF in my Kias. Is the ATF certified for the cars? I doubt, but it 'meets and exceeds' and is proven in the applications I'm after. Also, both Shaeffers and Valvoline are very reputable companies in my eyes, both making great efforts to produce high quality oils.
 
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Originally Posted By: turtlevette
You really think Mobil 1 is better than redline because they've spent 100 million on testing?


Um. Yes.
 
Originally Posted By: turtlevette
Yep, what wins on Sunday sells on Monday. Only geeks look at certifications, specs and tests.

You really think Mobil 1 is better than redline because they've spent 100 million on testing?

Only a moron would not. Otherwise all you have are website testimonials, internet blather and Old Man Sedgwick down at the feed store.
 
M1 (engine, gear and ATF which are readily available synthetics) has a strong following and served many millions of miles across vehicles and that cannot be said of Amsoil or RL (boutique fluids scarcely available). You will see a lot of folks on this forums use Amsoil/RL gear fluids but to an average joe who is not on these forums he would swear with M1 fluids.
 
Originally Posted By: Shannow
I put this in the wife's Captiva front to rear...

https://www.penriteoil.com.au/products/pro-gear-75w-90-full-syn

Gear shift is very good.


I love Motul Gear 300 as an MTF, shift characteristics in most 'boxes are excellent, especially with the VI it has.

Currently running Penrite Pro-Gear in both diffs and the t/case of the Disco, ran a mix of Motul and Castrol in the Defender and was going to run an oil Terry Dyson advised me on with a Kaiser locker in the rear diff but sold the old girl.
 
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