URGENT:spark plug question
 

Mazda prescribes both NGK BUR9EQP and BUR7EQP spark plugs fur the 13B REW engine.

It seems that local dealers only have the 9EQP series and the 7EQP series seems to some kind of motorcycle plug.

I somewhere read it's OK to use 4 times the 9EQP plug.

Is this true???

PLEASE let me know because I need to order them today to have them on Tuesday

THX

its fine to use the 9's all around (actually that is what is recommended if you have a modded car, hell some run 13's all around). they just might take a bit longer to warm up though but i doubt it.

my car is 100% stock and mods will not come to it soon (next winter/spring)

9's all the way around are fine. That is all that I have ever run.