I didn't say anything about clutch materials. ATF is probably GOOD for them, if anything.
Except for childish bickering, this has been a good thread. Good thing I can speed read a bit.

 

MTL is a Manual Transmission fluid. The L is for the lighter version . Viscosity range from 70-80. The regular MT goes up to 90. Seems freakishly thick to run in a wet clutch in my view, but that's just my opinion and many use it with good success. As for the noise with syns, the film thickness is thinner allowing any clearances to be heard more than the thicker dino film. This does not mean the dino protects better. Again, my personal explanation of why syns generally make an engine rattle more, as well as the thinner film causing the lifters a harder time to stay pumped up since leak rate will increase. If there is a weak lifter with a touch more clearance the syn will cause it to make noise, where dino will keep the leak rate lower making the lifter silent, or more so.
Ron

 

It used to be what Redline recommended for the primary, until they eventually came out with an oil labelled specifically for the primary. I never switched because it works well for me. Besides, it might even be the same formula with a different label. LOL
I love the stuff and would never switch for any reason. Too many years have gone by without a problem.

You'd never know it by looking at it.
Pours like atf and looks like atf.

Don't they measure gearlube different than they do engine oil?


.

 

Ed: I remember you saying it's similar to atf and went looking for it. The specs of 70w80 are from the actual mtl primary on the redline site. Yes, gear oils are rated differently so it works out to about a 40-50 weight motor oil . Maybe they reformulated it and never changed the spec sheet? Don't know.
Ron

 

Did some searching myself. And YES they forgot to update their sheet (it's 30wt).
Do you remember that I posted that they made a formula labeled specific for primary and I wondered if it was the same as MTL but with a new label?
Well I was pleasantly surprised as I suspect that you might be too.

This was a cool find!

Picture #1 confirms the wt issue.
Picture #2 answers the labeling issue.









Now if I can just find that guy that was busting my ***** and calling me stupid for putting "gear oil" in my primary and telling me I might as well be running cooking oil,...... He he!

Nobody believes me when I say this stuff runs well, shifts smooth, that I have tried many other oils and I like this one the best. Like I am a liar and stupid. (not a one of them ever even tried this stuff).

These boards are amazing sometimes!

(Not saying anything against you rbabos) - you've been cool with me always.

 

46¢ more for the Vtwin label. Same oil. The MTL label is easier to find locally.

 

Ed: 30 weight with the GL ratings would be about perfect in the primary. I'd try it myself if I ever run across it. Glad you cleared that viscosity issue up or I'd never have even considered it at all.
Ron

 

The local race car shop carries it in my town. The place where car gearheads buy their fancy parts. I have heard that other town race car shops sometimes have it too. Worth a look.

 

I thought that was inexcusable sloppiness on their part. It has me wondering what the actual viscosity of the stuff is?
I've been hearing a tiny bit of slap from my primary chain now and then, so went to check it tonight: had 1" or so cold, max is 7/8". Tensioner groove at 5000 miles is about 1/16", so since fastest wear occurs breaking in, I think the syn is working quite well, but if the Red Line has less drag, I'd think that would be a bonus for FE and engine wear.

 

Here's a gold star.
There, do you feel better now?