[Formulajones]

I can't see the article, it won't load for me. But one thing I've used for decades to help fight the build up of carbon and deposits is 2 cycle engine oil with TCW3.

It's a good cleaning agent that isn't harsh like some chemicals sold today, and it also adds lubricity to the fuel that's been missing since lead was removed. Great for the top end, valve seats, valves, and tops of pistons with no negative affect.

I just mix 1 ounce per 5 gallons of gas. Been using this stuff since the mid 90's on various vehicles and happy to say that on tear down I've had very little if any carbon build up issues.