Edit: the back of the bottle called Mazda front axle lubricant says GL5, 9k are you sure?

https://www.jimellismazdaparts.com/p...wd=&origin=pla

well it also says for all Mazda manual transmissions, typical Mazda

.

 

Thanks a lot!

Yeah, silly part names again. If they call it gear oil/manual trans fluid/diff fluid, I am sure a lot more people will pay attention to it.

 

Have heard good things about Amsoil GL4 synthetic trans fluid too, but same inconvenience to buy it as Redline

AMSOIL Manual Transmission & Transaxle Gear Lube 75W-90

 

I'll have to look at the back of my bottles and see what it says, I buy mine at the local dealer and I think I have an extra set for doing my trans and diff one more time.

 

So I just came back from the dealer.

I gave them the part number, and they absolutely cannot find the front axle lube in the system. They do have the 75W-80 in stock(albeit with a thick layer of dust, LOL), but not 75W-90.

Weird. Must be a Canadian thing, eh?

 

Lmao guess so bud, mazda Canada prob only wants us bringing the cars to them, try bringing a pail and asking them to pump 4 or 5 litres into it and bill you for the oil alone? That might work I hope

 

It did for me - Mazda Cincinnati pumped 5L into a clean container - but my limited testing at work, smell, etc told me that the MT fluid they sold me was GL-5. I took it back for a full refund and bought GL4 MT90.

 

You think the dealership would use the right stuff I'm gunna do the change with redline oil this week and update this thread with my findings

 

That's what I have been using for the last 60K miles or so.
Also, Amsoil Severe Gear 75W-90 in the diff.

 

You can buy Amsoil and Redline right off their web sites now. You can also buy Redline from Amazon. Hardly inconvenient.

In fact, now that you can buy Amsoil direct, I am planning to switch to their products at my next service interval. The dealer markup is what kept me away in the past.

 

If I recall, the FSM does state to use a GL5 or equivalent in our AISIN AZ6 6 speeds. I ended up using Redline GL4 after reading all of the complaints with using GL5.

I went with Redline GL5 in the rear diff, purchased both from JEGS. Delivered in two days, pretty convenient if you ask me. None of the local parts stores carried GL4 transmission.

 

The 2005 OM says GL4 or GL5.

The 2006 OM says GL4.

 

Yes, been thoroughly discussed here since 10+ years ago

 

Says Mr Millenial, I drive right by the Ford dealership regularly so for me just stopping and having it in my hand in 5 minutes is fairly painless and hassle free. Been intrawebbing since the early 90's so ordering online is well known to me. Call me an old school fool if you will ...


.

 

The redline website has all their dealers listed all you gotta do is put in your postal/zip and it shows you the closest ones...that's how I found the oil for 8x cheaper then amazon.ca

 

You have a lot to learn still

 

I'm 44, so IDK about that Millenial thing. Actually, that might be the greatest insult you could throw my way!

 

Don't sweat it man all he's done on this thread is insult me lol

 

S2 OM calls for GL-4, although S2 manual trans is different from S1 manual trans.

I know a local auto parts store near me that has Redline oils. As for Amsoil, Idk yet.

What about the Pennzoil synthetic gear/diff oil?

 

Is it GL4 or GL5?

If GL4, go for it.
If GL5, avoid it.

 

Pennzoil is all EP GL5 that I know of ...

 

I'll be wary with Mazda Canada MT oil as those might be for Mazda 3 and 6. I wonder how many of their staff even know what's an RX8.
I've started using redline MTL to satisfactory experience.
Rear diff didn't matter what brand as long as it's gl5 75w90. I dumped in leftover BMW Synthetik (aka castrol syntax 75w90). So far so good.

 

Gl5 for the rear diff? I thought gl4 fluids only in the vehicle....I may be mistaken but correct me if I’m wrong?

 

GL4 trans
GL5 diff

It's in the owner's manual.

 

Never got an owners manual with mine, thanks man