Alright all you Yota gurus, let me ask an opinion here.... I'm running Bosch Platinum plugs in my trucks so far with no known side effects. Has anyone had bad experiences with these. If so, what is the general consensus on a different plug ?

 

most of the die hard yota guys swear by the stock denso plugs, but unless you have problems with the bosch 4's then stick with them, but for the most part people tend to stick with denso or NGK's. just pull one of 'em and see how they are doing after a few hundred miles.

 

I've run them off and on over the years. I've had several fail out of the hundred or so I've bought. Center electrode would slip down and contact the ground, killing the cylinder.

I have not found them to be a 100k mile plug. By about 30-60k, replacement shows a definite performance increase over the now visibly worn older units.

 

only ngk gets used in my engine.