Spark Plus SC16HR11 Dense, is any using it and different??

I am using the revised plugs in mine. No issues.

 

nothing is going to run hotter, the spark plug is called 'hotter', meaning the self-cleaning takes effect at a lower spark plug temperature /

 

Uh, my experience is with 2-cycle and 4-cycle engines is that “hotter” plugs do run hotter where the arcing takes place at the tips and center electrode. A “too cold” plug would slowly accumulate carbon and ultimately fail when carbon bridged the gap or accumulated to the extent that the high voltage had an easier alternative pathway to ground and did not jump the gap.
A “too hot” plug would typically have whitish deposits on the ceramic insulator around the center electrode, rather than light brown, and in extreme cases the center electrode would melt or the ceramic insulator would crack into pieces, which would pass out of the exhaust valve if you were lucky , or hang up the valve or crush into the top of the piston if you were unlucky. Further, the tip a “too hot” plug under load could get hot enough to act like a glow plug and cause pre-ignition of the fuel-air mixture before the spark occurred. If you were lucky you would just hear pinging as the mixture ignited essentially too early and you could reduce load in time to prevent damage. If unlucky, full scale detonation occurred where the mixture all ignites at once rather than having a nice, gradual flame front, and that would over-stress combustion chamber components both with heat and the shock of the explosions, resulting in burned valves, holes blown in piston crowns, and possibly cylinder scoring. Correct heat range depends in part on the loads you create with your style of driving, so I would check how your old plugs looked upon removal and select either hotter or colder plugs based on that evidence.

 

More proof that the 2ZR-FXE generates more carbon than Toyota designed for?

Pixel XL ?

 

Not sure, mjoo, as carbon accumulation seems to depend on the extent of richness of the air-fuel mixture, the anti-deposit additives in the fuel mix (even Top Tier fuels differ in amount, types, and effectiveness of additives), combustion chamber temperatures, and extent of oil blow-by once the engine has significant ring or sidewall wear, or just stuck rings, and amount of the typical duty cycle the ICE and specifically the combustion chamber spends at low temps, I think.

 

Not sure, mjoo, as carbon accumulation seems to depend on the extent of richness of the air-fuel mixture, the anti-deposit additives in the fuel mix (even Top Tier fuels differ in amount, types, and effectiveness of additives), combustion chamber temperatures, and extent of oil blow-by once the engine has significant ring or sidewall wear, or just stuck rings, and amount of the typical duty cycle the ICE and specifically the combustion chamber spends at low temps, I think.

 

Not sure, mjoo, as carbon accumulation seems to depend on the extent of richness of the air-fuel mixture, the anti-deposit additives in the fuel mix (even Top Tier fuels differ in amount, types, and effectiveness of additives), combustion chamber temperatures, and extent of oil blow-by once the engine has significant ring or sidewall wear, or just stuck rings, and amount of the typical duty cycle the ICE and specifically the combustion chamber spends at low temps, I think.

 

Well, I guess 3 posts beats my meager 1 post...