recently biught an 81 rx7 what kind of spark plugs should I get and what fluids I should change on the car

 

Welcome to the forum.

Take a look at the FAQs. Looks of good info and will have what you need.

https://www.rx7club.com/1st-generation-specific-1979-1985-18/1st-gen-rx-7-faq-page-237777/

Also, take a look in the archives as there is a lot of good info in there too.

Kent

 

Lots of different opinions about what plugs and fluids to use, maybe the best thing is to start by taking a look at The Manual. You may have not gotten a Users Manual with your car, but we have all kinds of manuals in our Archives, including full PDF copies of the Field Service Manual.

As a general guide:

1-replace coolant with a standard mixture of coolant, which is about half water and half Ethylene Glycol plus an anti-corrosion agent (which you need to retard corrosion).

2-use high quality gear lubes in diff and transmission, like Redline or AMsoil , Royal Purple, etc.

3-Engine oil is arguable, but I use 10w30 Mobil 1 synthetic in all cars

4-spark plugs: usually people use NGK BR9EQ14 or BR8EQ14 in the 12A. Be careful of 'equivalents' because the electrode must not protrude too far into the chamber (no problem in a piston car, the piston just hammers it, but it may clip a rotary seal).

 

The corrrect spark plug for a 12A in an '81 RX-7 is NGK BR8EQ-14. Get four of them.