O so i was checking my plugs today and was also looking in my helsm to check how many ft lbs to torque them down and they said i was to have the ngk 6 i know there are alot of other letter to the name but i checked mine and had 5's so whats the deal. these were dealer installed. is ther an advantage to runing a hotter plug or what actually are the considered hotter compared to the 6's or what . accord has i/h/e so yes i know not much done but would like to get the hottest spark best combustion. So whats the stroy guys what the best idea!

David

 

the lower the # the hotter the plug

if you live in a cold climate use NGK ZFR5F-11 some even use the ZFR4F-11
warm climate use NGK ZFR6F-11
if you do a lot of hwy driving use NGK ZFR6F-11

 

i live in pa so its like 65 -7 0right now and can get as cold as like 0 but usually not much colder and i do more than half of my driving on the highway more like 70% itsa 96ex f22b1 120k on it so just curiousive had the plugs for atleast 20k so maybe time to freshen up?

david

 

just use the 5s all year around.. As for needed replacing.. just remove them and look at the electrode see how badly it is worn..
replacing plugs anywhere from 15-30k,,