PEA (polyehteramine) AKA Techron works very well. Available at Wally World. That's your fuel additive which cleans fuel pump, injectors and contributes to reducing carbon deposits in the cylinders. I'd add a bottle per whatever the instructions say, and I'd do it for several tanks of gas. The clean up almost never happens from just one application. But, I've seen it do wonders!
Next, fuggitabout ethanol free fuel. That engine/ fuel management system was designed for ethanol enhanced fuel (up to 10 percent or so).
READ your owner's manual. Put the fuel octane rated gas that they recommend! Any more is like adding sugar to your soda pop. Waste of money.
I personally use either Chevron, Shell, or Exxon. I choose to stay FAR away from Wally world/ Sam's Costco fuels. My customers who use those "lesser" fuels keep my busy! I always advise not to jump over a dollar to save a nickel when it comes to fuel choices. The Few dollars saved can cost thousands later.
During our recent over 5 dollar a gallon events, Wally World stores in my area reduced gas prices by 2 dollars a gallon. I remember seeing lines similar to the lines I saw during gas rationing in 1972.... lines which stretched out of sight.