![]() Looks like I goofed typing those mixes though.Ģ quarts MTL + 1 quarts MT90 is not as good as the 50/50 mix. I believe this may be what you did here, when you say quote:ġ quart MTL + 2 quarts MT90 which is not as good as the 50/50 mix.īut it seems like these two blends would be the exact same thing right? They are both 1/3 MTL and 2/3 MT90 fill. I already have a few bottles of each laying around so I might just test it out over the holidays. I was thinking (and this might sound like I'm over-thinking) about mixing MT85 and MT90 to get a ~MT88 type of blend. Thanks for that very informative post Ryan. Take with grain of salt and try at your own risk.Īlso before someone asks me about our cars taking 3.2 quarts of fluid I’ve always used 3.0 quarts for changes as unless you leave if to drain for days you’ll never get that last 0.2 of a quart out and the 3.0 has always easily gotten me to the full mark when level… so no need to waste money buying a 4th bottle of fluid. Also zero grinds and upon draining at 5k miles there was no tell-tale synchro glitter or metal particles to indicate anything other then a healthy transmission. The synchro’s seem to love it as they quiet down and just all around seem to function faster especially when cold and on downshifts. No notch when cold, no notch when hot or pushed hard, buttery smooth up shifts and really nice downshifts even if you’re lazy and aren’t rev matching. This mix was tested in both my 06’G35 and my 09’ G37 and the results are like the best of both worlds. I mix 1 Quart Redline MT90, 1 Quart Redline MTL and 1 Quart of Amsoil Synthetic Synchromesh Fluid. ![]() Now for the not so mainstream answer and for the best shifting fluid I’ve ever come up with for all weather and all purpose use. Definitely not for cold weather use.Ģ quart MTL + 1 quarts MT90 which is not as good as the 50/50 mix.Ģ quarts MT90 + 1 quart MTL which is a better alternative for a mainly street driven car then straight MT90. I wouldn’t us straight MT90 unless you live where the temperature remains fairly high year round so warmup isn’t as much of an issue or if you track the car regularly. While cold the downshifting was much worse then MTL. Downshifting was exceptional once warmed up over MTL or Nissan fluid. When pushing hard or on really hot days it maintained good shifting no matter how hard you pushed. The colder it is overnight the worse it’ll be. Much notchier then straight MTL in the morning and takes longer to warm up. Cold downshifting was somewhat worse then stock or MTL.ģ.) MT85 Straight - No surprise here it performed pretty much exactly like #2 the 50/50 mix as that is all Redline has done to make its in-between formula. Downshifting was much improved once warmed up over MTL or Nissan fluid. When pushing hard or on really hot days it maintained its good shifting qualities with very minimal notch at high RPM. Down shifting was ok but no significant improvement over Nissan fluid.Ī little notchier then straight MTL in the morning for the first few blocks but warmed up quickly giving nice smooth shifts. Once the trans started getting hot it would get notchy quick and you could feel slight gear nibble at high RPM before it meshed the next gear. I have been actively buying all the old stock I can find.I've run multiple fluids through my 350Z/G35 and 370ZG37 transmissions for testing including 3 of the Redline MT oils both straight or in mixes.įelt good when cold, shifted smooth without notch under normal driving until you pushed it hard. It may be very difficult to find because about a month ago it was suddenly discontinued without explanation. My all time favorite is the manual transmission gear oil part number GM12346190 or ACDelco 10-4059, same stuff. So you may want to look around for for a 75W-90 GL-4 with a viscosity less than 15.5 cST and see if that helps. Problem is the bearings and gears have greater wear. Manual transmissions like to shift very well with thin gear oils. I suspect that may be why the 3rd grind suddenly showed up when cold if it was not previously there as you noted and if it had never been changed the gear oil that was in there might have sheared to way less than 15.5 cST so that you were effectively running a much thinner gear oil when it was changed than the thicker MT90 you put in. Translation: its a bit on the thick side. It shows to be 15.5 cST 100 degreesC which is near the upper limit for those in its class. OP, neither of my Tacos very much liked the MT90, either in the 5-speed or the 6-speed.
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