Good news forum members!!, REDLNE OIL now makes 75w85, Manual Transmission GEAR OIL (GL4) for our z's!!!!

MT85- 75W85 GL4 GEAR OIL

http://www.redlineoil.com/product.aspx?pid=140&pcid=7

 

Oh man! That is flippin awesome! I was thinking about redoing my G and S13 this fall! It's only been 2years, so it might be overkill. It is still more expensive than Nissan MTF, which works just fine. You really need the proper viscosity for you daily driver if you care about your gas mileage.

 

Has anyone used synthetic gear oil for a los period of time on a 2003-2006 manual transmission? Is it realiable and safe on the long run?

 

redline oil is synthethic. I have no problems with them and my z is @90k plus

 

How many miles/years have you run sofar on your redline transmission and gear oil? When do you plan to change the fluids again?

 

Every 30k miles.

 

about 45k with no problems. I just ordered my fluids. i wll change it in a couple of weeks.

 

I just went ahead and bought the Valvoline 80w-90 gear oil from Autozone for my differential. Why pay $20/qt for Redline when you can buy this for $6.00/qt? You can't beat that!!

 

[QUOTE=Diesel350;8752502]I just went ahead and bought the Valvoline 80w-90 gear oil from Autozone for my differential. Why pay $20/qt for Redline when you can buy this for $6.00/qt? You can't beat that!!

what?!!, $20/qt!!? where did you see that? the link says $12+/qt. But then again thats your choice if you want to use Valvoline.

 

[QUOTE=SlipZ;8752767]Advance Auto Parts sells it for $20/qt. At any rate why pay $12 when you can pay half?

 

I just swapped out my OEM fluid for the new 75w85 redline stuff, and I gotta say I like the OEM fluid better. The trans with the OEM fluid was a little notchy with 1-2 shifts (brand new trans too), but it's even worse with the redline. I'm thinking about trying Amsoil or even some GM syncromesh before I put the OEM stuff back in.

 

How long have you had the fluid in? Have you noticed a change in fuel mileage at all? Please give an update.

 

What OEM Nissan diff oil are you guys using?

I went to thenismoshop.com and all they had was like 75W-140 or something.....

 

Nissan doesn't have OEM Differential gear oil. Just use any gear oil that is API GL-5 SAE 80W-90

 

I've had the fluid in for a couple of weeks now (about a tank of gas worth of driving). Haven't noticed any change in mileage at all, but the shifting seems to be getting even rougher. What is especially odd to me is that it seems to shift fine in the morning when it's cold, but once it starts warming up the shifting gets gradually rougher. Perhaps the redline 75w85 is actually too thin? No idea, just throwing that out there. But I'm itching to try something else and I can't decide between OEM, synchromesh, or amsoil.

 

I should add that I also did the diff along with the trans, and put redline 75w90 in the diff. Haven't had a single problem with it, very happy there. I just wish their tranny fluid performed the same way :/

 

I just did the transmission and differential fluid change, and at the end I realized the washer for the transmission drain plug was left off. Anyone have any suggestions for ways to put it back on with minimal fluid loss, or is it likely to be okay without it and possibly tougher to loosen next time?

Edit: I was able to get my friend to plug the drain hole with his thumb while I placed the washer back on the plug. I think I only lost 1/10th a quart in the process.

 

Hmm that's strange. When I had the MT-90 in there the first morning shift in 30 deg F temps was a huge grind and mpg dropped to a terrible 16mpg. Too bad, I have a box of MT-85 sitting here right now. It's only pennies more than Nissan MTF so I thought maybe Redline got it right this time. Perhaps all they did was mix a touch of MT-90 to their MTL and relabeled the bottle and add come coloring dye? Maybe I'll wait for more reviews on the MT-85. Anyone else use this stuff yet?

To the person who forgot the washer, if you have a little bit of trans fluid left, just swap the plug real quick and top off if necessary lol. Otherwise, just look underneath and see if anything's leaking, if not you're probably golden.

 

Keep in mind what's "cold" for me in San Diego is likely a lot warmer than the temps you see. It rarely gets below 50 here. In any case I just bought some amsoil so I'll be swapping with that when I get some time in the next few weeks. I'll post a comparison with the redline after I get some driving time with the new fluid.

 

Quick update: I decided to put the MT-85 in my trans last night. Rear diff has new Castrol Hypoy C 80W-90 which has been working for me. I commuted about 20mi on it so far. If it was a blindfolded test I probably wouldn't even know the difference. However, the MT-85 feels a tiny tiny bit more notchy than the oem fluid. I don't think it's necessarily any better or worse. I would say that it is worth getting over oem especially if the dealer is marking up considerably. The Redline basestock has got to be superior than dino imo. My main concern is gas mileage and shift quality when the first shift is done when the car sits in sub 32deg F. I'll give you guys another update then.