I was wondering if i can use royal purple for my manual trans and diff. fluid. thanks

 

Yes.


-Ted

 

Maxgear..

 

so it will not do anything bad to my car right since i got an S4. will it improve anything.

 

If you use the proper, recommended fluid, you're getting better protection.
In most cases, the transmission shifts smoother.


-Ted

 

what is recommanded for my car and have anyone ever try royal purple for their rx7 before.

 

Yes, people I think Royal Purple is fairly common.

That's what I have in my 7.

 

so is it better than the fluid from mazda

 

Yes...from what I read, it is among the best

 

I use amsoil, stuff is wicked good, and better priced then most others. just my .02 cents

 

I personally use Redline, but I hear royal purple is just about as good an probably easier to find in local stores. I haven't heard much about AMSoil's stuff, but if its anything like their motor oils I'm sure its good.

 

i mean i'm using it for my diff and tranny

 

Royal Purple is suppose to just as good as redline for diff and tranny fluid. Remember to use the correct fluid

 

what the correct fluid for my car. S4

 

http://www.teamfc3s.org/main/factory...ual/1986_1988/

Here is the factory service manual. it answers all of these types of questions.

Take a look under the "manual transmission" section.

 

im not sure if that is synthetic oil but ive heard not to use synthetic in a old tranny cause it will wash the syncros clean and they will grind

 

Thats bogus. There are people with grinding trannys and they switch to redline or rp (both synth) tranny fluid and the grind either goes away or gets better.
Also, I believe you use RP 75-90 in both tranny and rear end. If you have a lsd, get the one with the lsd additive in it (max gear, I think)

 

thanks for the help but im just thinking about changing it because i dont know if they ever change it before when i bought it and now it says 84225 miles on it but i dont think its correct because its hard to believe that a 20 years old car would have that less mileage on it.

 

which royal purple do i use for the diff. i have an lsd diff. i went to kragen and saw the manual tranmission oil, 80w-140 max-gear and synchromax. which do you recommend me to use for my tranny and diff. and at kragen i only saw the 80w-140 max-gear oil. thanks

 

well i dont know for sure but i heard that royal purple got sued for stating that there oil was 100% synthetic, but it wasnt, so now it cant be sold in california, but i may be wrong, I use MOTUL