Changing my spark plugs, but I do not want to buy the NGK spark plugs. I'm looking for a better brand. I took a look into the Denso spark plugs and thinking bout buying them instead. So here's the deal, the engine must have 2 Trailing and 2 Leading I know that the NGK has that writing on it, but the Denso online store doesn't say. I talked to the Salesman, but it seems like he dont know ****. The Denso (box, pic, image, etc.) dosen't say Trailing or Leading so I don't want to buy the wrong plugs and **** up my engine.
What to do?

 

NGK IS the best, so get the NGK's.

 

If you do some research here in the forum you will conclude that the OEM NGK sparkplugs are the best for our car.

 

I think NGK's are made to Mazda's spec cuz nobody else has spark plugs for rotary engines.

 

Dealerships will charge you roughly $50 each so about $200, but if you go to the some of the vendors here you can get all four between $80 to $100.

 

The NGK are the "better brand" .... period

 

Get them from Auto Zone/Advanced Auto...$80 + tax

 

What do you not like about the NKG plugs?... I say go with NKG. I don't really think you are going to find better plugs for your 8.

 

If you don't want NGK, make your own.

 

well most people who dont know about cars think stock = crap by default.

 

I know someone who uses Denso vice NGK. If you really must use it than NGK, PM Mangnok.

 

Always stay with stock NGK ignition wires and spark plugs on rotaries. It is possible to run different heat range plugs and still stay within the NGK brand.

The only non-NGK spark plug for rotary engines I've ever seen was the autolite plug made for 86-91 rx7s...which was complete crap.

You can also buy the 86-91 (or the 93-95 platinum) rx7 NGK spark plug set and run them in the rx8 by simply removing a washer from two of your old plugs and double stacking them on the rx7 trailing plugs (leadings need no modification). I don't know that there is any significant power difference, but the price difference is significant and they seem to be far more available than rx8 plugs. I would bear this in mind particularly when troubleshooting or unflooding an rx8, since the stock plugs tend to foul quite easily and you don't want to waste/foul an $80-100 set of plugs if you can help it. The rx7 plugs can be had for about 25 bucks a set.

 

a question for those saying to only use NGK.. what about BHR? or is that for more serious driving, as in, NGK is good for all around driving?

 

BHR makes spark plugs?

 

I was waiting for someone to comment on that, LOL!

 

wow, sorry, i guess i turned on my dumbass switch, my bad! lol

 

The plugs that you get from BHR are the NGKs.

 

well aware of my little mistake lol my bad. looks like NGK all the way

 

the problem with Denso plugs is that it's just LIKE the original NGK plug --- which means it does not have the gap to prevent (or should I say, lower the chance?) flooding.

I want to try some Denso plugs one day, cuz Denso makes pretty good products, even the plugs might die fast

 

I go with the saying "If it aint broke, dont fix it"... whats wrong with the NGK's? They get the job done and are the best, plus why mess around with spark plugs that were designed for the this engine? Not worth it imo...

 

I've run the cheapy rx7 copper ( $6 ) and plat plugs ( $7 ) in my car since the first change. I swapped them out every 10K miles or so. Had zero problems with my engine till I hit a pig at 104K miles. :P

If you do your own maintenance, use the rx7 plugs, they are cheaper and work just as well the iridiums are a ripoff.

 

NGK or bust my man!

 

whats the point? You spend almost the same amount of money to replace your plugs every 10k miles when the normal ones will get you 30-40k miles before needing to be replaced. Why not just use the correct plugs for the car? you aren't really saving any money this way. Though I guess you really enjoy changing the plugs out.

 

the iridiums are supposed to last longer but as ashy as the rx8 is, the point is wasted. It's better to change the cheap plugs more frequently, so they stay clean and crap free, plus you will notice a problem quickly this way too long before you blow a seal or carbon up a rotor from a coil going bad.

It takes like a whole 5 minutes to change the plugs.

 

Changing rx7 plugs every 10k is overkill, they could easily last twice that long or more.