Trans Oil

[protege321]

can anyone recommend a good oil and weight to put in the manual trans for smooth shifts. thanks.

 

[protege321]

mineral to synthetic? is that going to cause any problems. mobil 1 synthetic 75W-90 or 75W-140? anyone?

 

[E21BIMMERHEAD]

mineral to synthetic? is that going to cause any problems. mobil 1 synthetic 75W-90 or 75W-140? anyone?

iv been thinkin of trying 75w-140 but im afraid in the winter it might take forever to warm up(like when its -35 outside). what you end up choosing?

 

[protege321]

i went valvoline 75-90 conventional, its really smooth.

 

[MaxPower]

Pretty happy with Mobil 1 75W-90. 75W-90 is the Mazda recommended weight.

 

[protege321]

yeah a mazda tech told me not to ever switch to synthetic so i just went conventional and the trans still felt like new. changed it once, drove 500 miles drained it and changed again and it feels really good. im happy.

 

[lilpoindexter]

I put redline snyth oil in my t case when doing the clutch at 105k miles...I even forgot to replace the axle seals...no leaks...Im not sure where that whole "dont ever use synth oil after using dino oil, or you'll get leaks" tale came from...

 

[protege321]

post another reply after 10k-15k miles. (2thumbs)

 

[Inovagent]

I put redline snyth oil in my t case when doing the clutch at 105k miles...I even forgot to replace the axle seals...no leaks...Im not sure where that whole "dont ever use synth oil after using dino oil, or you'll get leaks" tale came from...

Probably from dino oil manufacturers and ignorant people who repeat whatever they hear without using critical thinking.

 

[protege321]

i think i used plenty of critical thinking lol, i dont think our family sedans were made to run syn oil bud. but nice on bumping the 5 month old thread.