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Brown muck on spark plugs do i go hotter or cooler????
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Author:  Gadgets mini [ Wed Nov 25, 2009 8:34 pm ]
Post subject:  Brown muck on spark plugs do i go hotter or cooler????
Pulled the plugs today NGK BP6ES and the electrodes were covered in a light brown muck they were only oily on the threads.

Question is do i need to go hotter or cooler or stay the same ???

its a 1098

cheers

Simon
Author:  drmini in aust [ Wed Nov 25, 2009 8:36 pm ]
Post subject: 
Are you running Valvemaster additive?
It really craps plugs up bad with brown sh!te...

A light brown to grey deposit is fine. A BP6ES plug is OK in most motors.
Author:  Gadgets mini [ Wed Nov 25, 2009 8:37 pm ]
Post subject: 
yes Doc when i remember to add it :oops:
Author:  drmini in aust [ Wed Nov 25, 2009 8:39 pm ]
Post subject: 
Gadgets mini wrote:
yes Doc when i remember to add it :oops:


I would seriously NOT run it. Use Flashlube, it's cheaper, and doesn't leave any crap there. 8)
Author:  Gadgets mini [ Wed Nov 25, 2009 8:43 pm ]
Post subject: 
Doc,
I just checked the bottle and it is Flash lube not the other stuff and i generally run Mobil premium in it

will it leave that muck if it runs lean??
Author:  drmini in aust [ Wed Nov 25, 2009 8:45 pm ]
Post subject: 
Nope it shouldn't. Did you run Valvemaster before? More likely to run white if it's lean. If so I'd bung 4 new plugs in...
Author:  Gadgets mini [ Wed Nov 25, 2009 8:47 pm ]
Post subject: 
drmini in aust wrote:
Nope it shouldn't. Did you run Valvemaster before? If so I'd bung 4 new plugs in...


No pretty sure i have always run flash lube in it have run an ethanol blend a couple of times before i read here that it is not a good idea if running SU's
Author:  sgc [ Wed Nov 25, 2009 9:19 pm ]
Post subject: 
Gadgets mini wrote:
have run an ethanol blend a couple of times before i read here that it is not a good idea if running SU's


That's because the ethanol eats certain types of rubber, like the O-ring seal in the outlet from the float bowl.

Different brands of fuel will burn differently and leave different deposits.. personally I stay away from Shell and stick to BP Ultimate.

I have found that after lots of K's without cleaning, I get a little brown plaque on my plugs.. I am running Valvemaster additive though. Might give Flashlube a run and see if it clears up! Thanks for the tip, Doc :D
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