Which Fluids/Oils and How Much?

[bcrdukes]

Hey folks,

New E30 owner. I did a search but didn't find the answers to my questions.

1. Which transmission fluid is most recommended? I see a mish-mash of redline 75W90 and MTL. What do you recommend and why? How much will I need?

2. Differential Fluid/Oil - What do you folks recommend and much do I need. Did a search on this and couldn't find an answer to this.

Thanks!

[agealy]

I had almost the exact same question. See my thread: http://r3vlimited.com/board/showthread.php?t=140991

[bcrdukes]

Did you use Redline MTL in your differential as well?

[bcrdukes]

Found out as per owner's manual:

Transmission (manual): 1.3quarts of GL-4 based fluid. (Redline MTL)
Differential: 1.7quarts of GL-5 based fluid. (75W90)

[jhowell]

Has anyone tried Swepco 201? I'm thinking of giving it a shot - my trans has 227,000 miles and it feels great - I'd like to try and keep it that way. Swepco seems to be about the same price as Redline. Wanted some feedback before I threw down $50 / gallon.

[dkmr]

I just changed mine. I put Redline MTL in the tranny and 75/90 syn in the diff. Seems to work like it should.

[e34john]

Just did this the other weekend
2 quarts MTL
2 quarts Redline 75w90 Gear Oil.
You will have some fluid left over.
Also had to pick up a huge allen hex key from sears. I think it was 17mm don't remember but it was the biggest one in the store.

[turbo55]

What kind of MTL? Redline 75W80, but I seem to come across posts of 75W80 being used in the trans as well?

Also, I have a 325 with an LSD, the Redline website says their 75W90 gear oil already has the LSD additives in it, anyone have any issues with running it in their LSD?

[turbo55]

Nevermind, stupid question, 75W80 is the only MTL...

[///M42 sport]

stick with redline for your diff oil too. I can never remember what weight it is. Should be on redlines site.

[turbo55]

yep, just ordered 2 quarts each of redline MTL 75W80 GL-4 for the tranny and 75W90 GL-5 for the diff last night