340 Gets Terrible Gas Mileage

I figure I'll take a red x with the rest of you...by echoing that I will never use champion plugs in my motors.
I had the insulators come loose back in 1997, they slid up n down on the electrode. Poor quality control back then BUT because of that experience 'one I've never had with any other brand' I wont use them to this day.
I'll add..
Some people are such sensitive assholes...that without even questioning why... 'to possibly learn something' they just hit the x.
Volaredon who comes here to...learn? Share?..but instead comes off like a know it all. Not one person appreciates that approach...I can tell ya that.