[MrNguyener]

Plugs changed about 30,000km ago and it looks so black already? What could be the reason?

2016 Mazda 6 with 236K Km.

 

[MrNguyener]

Sorry didn't upload pictures

 

[TalonTsi90]

Thats not fouled at all. Looks good. Do you ever get it hot enough? Like wring it out to redline in a couple gears? Thats the only thing that could improve on that.

 

[MrNguyener]

Ah was thinking the black carbon at the top treads were a bad sign?

 

[TalonTsi90]

Nope, just means you dont rev the crap out of it all the time.

 

[Byakuya]

Nope, just means you dont rev the crap out of it all the time.

Ah was thinking the black carbon at the top treads were a bad sign?

While I don't condone flooring it all the time, it's definitely fine to open it up from time to time and get things going a bit

 

[MrNguyener]

I just took it out for a run hitting 160 180kmh redlined from 3rd to 4th then 5th. Haven't done that in a very long time. Had to wait until 2 3am to do it as I didn't wanna get a ticket. Let's hope it helps!

Did notice black spot in the tailpipe though after, guessing that's where the carbon is going?

 

[TalonTsi90]

Well, yes and no. If you dont get the exhaust hot enough to burn off the condensation, when you do get it hot enough, itll run out the tailpipe.

 

[Byakuya]

I just took it out for a run hitting 160 180kmh redlined from 3rd to 4th then 5th. Haven't done that in a very long time. Had to wait until 2 3am to do it as I didn't wanna get a ticket. Let's hope it helps!

Did notice black spot in the tailpipe though after, guessing that's where the carbon is going?

Also, redlining isn't required - a WOT (wide open throttle) and getting the RPMs up in the 6k range is all you'd need once in a while.

 

[MrNguyener]

What I did was just floored it with the pedal passed the "click" and it went 3rd to 5th. I have an automatic transmission.

How often should I be doing this? I haven't done this a very long time because I thought it might be bad for the car.

 

[TalonTsi90]

Once or twice a month at least, the plugs have to get hot to get to self cleaning temps. A quick romp up to 80 on the highway should be enough as long as you dont get right off the x-way right after.