Can two or more ATF with the same Viscosity have..

[BMWTurboDzl]

Different friction modifiers?

 

[CharBaby]

I would guess the formulations can be slightly different from batch to batch, brand to brand. Mostly they try to make them under the directions of their own SOP's.

But myself, working with many formulations of medical procucts, there are always slight differences from batch to batch which is why we calculate adjustments for testing hoping to keep all things the same.

No two or more formulations are exactly the same(though close to one another) which is why we see different reading in VOA's on the same product/grades. All readings/testings still being in spec.

 

[440Magnum]

Absolutely 100% positively they can! A good example would be Dexron III vs. ATF+4- same viscosity range, but very VERY different friction modifier packages. Same would be true comparing Dexron II vs Type F.

 

[CharBaby]

Yes, I failed to mention the different types of ATF's such as Dexron/Mercon or MerconV compared to ATF+4 and Import ATF's.

Same types can be different though!(Slightly)

 

[BMWTurboDzl]

Okay. I was wondering because some people will claim an ATF is suitable for X simply based off the Viscosity. It also has me wondering about universal ATF. Do these products meet bare minimum qualifications at some level? I've seen a universal ATF that meets A & B not C and another which meets A & C but not B.

 

[440Magnum]

Universal ATF: Doesn't work exactly right in any vehicle.

 

[Whitewolf]

Oh yes, very different there is an SAE paper that I will try to find and post a reference.

 

[Shannow]

Molakule's link to a Valvoline paper on universal ATF has me rethinking my aversion to it...

https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=3189684#Post3189684