Hello, I realize this is a trivial question in comparison to some, but I just bought a 94 FD with no owner's manual, and so far I have yet to find a used one.
I cannot seem to find the recomended tire pressures after looking on all of the various stickers on the car (as you usually can). So could someone please let me know what the manual shows for recommended psi.
Also, on the same lines, what grade of oil should I use for an oil change - temps here should range between 30-80F over the next two or three months.

thanks in adance!

 

Go to the following link and download the owners maunal and service manual.

http://www.iluvmyrx7.com/

 

Tire pressures depend on the tire. However, if running stock rims, try running:

29 PSI Front (Cold)
27 PSI Rear (Cold)

As far as oil weight, run 10w30.

 

Tire pressures are on the sticker in the driver's door jamb.

 

The recommended in the door jam and shop manual is actually 32 psi, but I've seen these recommended pressures 30-29 front and 28-27 rear quiet often.

 

Thanks for that link...now I can be in less of a hurry to get an actual owners manual. I looked in the door jam at the stickers initially, but apparently didn't see the air pressures...will look again.
So what I am looking for in the door jam is probably gonna say 32 all around, or are the tire pressures staggered? I am assuming the same all around since the car has the same size tires and a near 50/50 balance, right?

 

32 all around is pretty good. i usually run 33 front and 30-32 rear. roads around here are kinda rough otherwise i might run less up front.

 

10w-30 when it's cold. when it starts to get warmer run 20w-50

 

Should the tire pressures remain the same if I am using a lower profile/wider tire?

 

The coldest it will likely be here is about 30-40 at night during this oil change cycle...and typically day time temps. will be between 50-80 from now to mid spring. Is this what you mean by cold enough to run the 10W-30? Also, another thought - will thicker grades of oil tend to clog the OMP system more-so?

If the same amount of weight is distributed on a wider tire, the needed pressure would decrease. However, I don't know a formula to determine how to calculate the new figure, but I am sure there is one out there. I really don't think that profile would affect the pressure needed very much however. Just watch overinflation with low profiles...they tend to blow out under this condition due to less bump absorbtion and higher temperatures.

 

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/manual-says-inflate-32psi-but-when-377727/

 

By the way, I cannot get the iluvmyrx7 link to work at all...
Does anyone know of an alternative site with an owner's manual download?

 

^The site goes down periodically. Check back later today or tommorrow.
If your looking for an original manual, keep a watch on Ebay. I see them come up there periodically. Or better yet, place a WTB add in the "parts for sale" section of this forum. You might also find the FACTORY SERVICE MANUAL in book form too, but they tend to be a bit pricey. Good luck with your car.
Jim

 

Thanks...I already have a "watch" on Ebay for one...and of course already tried the WTB thing.
It is always nice when I buy a car to go through the whole owner's manual. Unfortunately, after owning several cars, this is the first one that didn't come with the manual...

 

Just buy one from Mazda. It will run you under $100, and it will be the best money you can spend on the car.

 

Just so we're clear, the "Owner's Manual" and the "Factory Service Manual" are two different things. The Owner's Manual will tell you very little about this car. What you will definitely want to get, especially if your a 'do-it-yourself-er', is a FSM. Have you tried that link today? I just went to it and it's up now.

 

Yes, I see that it is up now! I will try to get all of the info I can!

 

I would say 20w-50 with those temps.