What oil for MT 6?

BrianMSmith · 04-07-2010, 01:01 PM

I bought 2 quarts of redline MT-90 and 2 quarts of MTL, this should give me about a 72.2W85 oil. The spec is 75W85.

Is that right?

semtex · 04-07-2010, 02:09 PM

So you're planning to mix them? Then what? What are you going to put it into?

BrianMSmith · 04-07-2010, 02:57 PM

I am going to put it into the transmission!

semtex · 04-07-2010, 03:24 PM

I just used straight MT-90. What's the rationale behind mixing them?

ChrisSlicks · 04-07-2010, 05:06 PM

I think people mix the MTL in to make the oil a little thinner for low temperatures and improve cold shifting. MTL has less than half the viscosity of MT-90 below 100 degrees.

BrianMSmith · 04-07-2010, 05:16 PM

Quote:

Originally Posted by ChrisSlicks

I think people mix the MTL in to make the oil a little thinner for low temperatures and improve cold shifting. MTL has less than half the viscosity of MT-90 below 100 degrees.

MT-90 is 75W90 and MTL is 70W80. So I do not think MTL is half the cold viscosity of MT-90. 70 vs 75.

ChrisSlicks · 04-07-2010, 05:22 PM

Quote:

Originally Posted by BrianMSmith

MT-90 is 75W90 and MTL is 70W80. So I do not think MTL is half the cold viscosity of MT-90. 70 vs 75.

It is. The gear oil weights are weird.

MTL is the equivalent weight of 5W30 engine oil.
MT-90 is the equivalent weight of 15W40 engine oil.

MTL viscosity at 40C : 56 cSt
MT-90 viscosity at 40C : 90 cSt

There's even more disparity at room temperature or below.

kenchan · 04-07-2010, 06:09 PM

wasn't there a guy that ended up with 10oz in his engine?

04-07-2010, 01:01 PM	#1 (permalink)
BrianMSmith Enthusiast Member Join Date: Dec 2009 Location: secret Posts: 267 Drives: 370Z, Ducati 748S Rep Power: 15	What oil for MT 6? I bought 2 quarts of redline MT-90 and 2 quarts of MTL, this should give me about a 72.2W85 oil. The spec is 75W85. Is that right?

04-07-2010, 02:09 PM	#2 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	So you're planning to mix them? Then what? What are you going to put it into? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

04-07-2010, 03:24 PM	#4 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	I just used straight MT-90. What's the rationale behind mixing them? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

04-07-2010, 05:06 PM	#5 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	I think people mix the MTL in to make the oil a little thinner for low temperatures and improve cold shifting. MTL has less than half the viscosity of MT-90 below 100 degrees. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

04-07-2010, 02:57 PM	#3 (permalink)
BrianMSmith Enthusiast Member Join Date: Dec 2009 Location: secret Posts: 267 Drives: 370Z, Ducati 748S Rep Power: 15	I am going to put it into the transmission!

04-07-2010, 06:09 PM	#8 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	wasn't there a guy that ended up with 10oz in his engine?