look what happens to your plugs when you have unseated piston rings and you have blowby.....

yes that is oil left by the plug



glad i decided to change them today


can anyone recommend a 1 step colder plug down from denzo iridium ik20's? or will these plugs be cold enough (stock b16 head/gsr block w/p73 overbore pistons, 11.4-11-6 compression)

 

up for coastal 10-30w oil on my plugs

 

oil blowby rusts???



hope u figure it out man.

 

IK22s for 1 step colder

 

thanks man? are those irdiums or no?

 

Octane booster and fuel additives equals red color on the plugs.

 

i thought octane booster and fuel injection cleaner would help burn better...not worse? that looks like rust man

 

Wouldn't rust be a sign of water in there? Oil should prevent rusting. I almost think head gasket?

 

Does the gas you run have MTBE? MTBE leaves a orangy residue.

 

Looks like deposits from fuel additives. Happens a lot, especially with octane boosters. Not sure why is built up so much though, unless the plugs are old.