Hi everyone!

I need to change the spark plugs on my 1988 Mazda Rx7 Convertible NON-turbo. Everything is stock.

I found some in the RockAuto catalog, and would like to know if these would be good for me (I know they say they are but I have trouble putting trust into automated computer systems telling you what you need).

They are the
NGK Part # 5255 {#BUR9EQP} Premium Platinum - Trailing {.056 gap}
-and-
NGK Part # 4764 {#BUR7EQP} Premium Platinum - Leading {.056 gap}

They are 6.14 each (+shipping).

My understanding is I need to buy 2 trailing, that are installed in the top two holes(term?) and 2 Leading plugs for the bottom two.

Questions:

• Is this a good price for these/does anyone know where I can get them cheaper?
• How many miles should I expect these to last?
• Is there an advantage of buying the Platinum plugs over the Coppers/what is that advantage?
• This may be a dumb question but: would it be a bad idea to buy the cheap $2.50 Autolite plugs?

Here is the catalog.

1. Copy/Paste "1988 mazda rx7 mfi" into the search field.
2. click "Ignition"
3. click "Spark Plug"
4. Now you are viewing the list of products I am talking about.

Thank you so much!
Koenrad

 

Always buy NGK plugs. 7EQ (leading) and 9EQ (trailing) are the standard recommended plugs. Yes, you need 2 of each. The platinum versions should last a little longer, generally cost more. Of course, $6 a plug is pretty cheap.

As far as how long they should last, rotaries go through spark plugs fairly quickly. I'd expect to get around 10,000 miles out of them before replacing.

 

Yup..always run ngk!!!! Two leading and two trailing....good luck!!!

 

NGK Platinums are what I Swear by.(even if they are a bit more in price)
Other Plugs,forget about it.
You will find that parts,plugs,etc are not exactly cheap.so get used to it now and you will do fine!

 

Thanks everyone! I just wanted to get some validation before spending money.

 

I used NGK plugs on my 13b powered Miata and never had a problem with them

 

What type of wires would you use with these plugs? My bro-in-law bought some plug wires from Advance Auto parts, not sure of the brand but he only buys the best they offer, and they were arcing when he put them in.

 

i have a fairly stock engine and run the NGK 7EQ for leading and 9EQ for trailing with 10mm spark plug wires. works just fine.

 

There are NGK wires installed right now, they came when I bought the car (about 4 months ago). They are the blue/black ones. They seem to be in good condition so I'm not going to replace them yet. They sell the same set on rockauto.com

Nice, thanks for your input. I'm not sure what size wires I have, but I ordered the plugs. Hopefully they come today :-).

 

Nice, enjoy ^_^