TC-W2 2-stroke oil additive, cleans everything and increase mpg at the correct ratio
https://www.ls1.com/forums/f48/been-testing-oil-91206/"Use 1oz of the two stroke oil per 5 gallons of gas ( 1oz-5gallons/ 2ozs - 10 gallons etc. and that is the perfect ratio. Too much and it will make your engine run worse....too little and it wont do anything.....use the proper amount.....get a little bottle and keep it in your car.....We have seen a maximum of 5% better MPG down to a minimum of 2% better MPG. All of our test mules reported much smoother idles and cruising. No smoking or ill effects. No residue on plugs our pistons....actually the opposite....we saw "cleaning".....I am now comfortable recommending this for all. I also now run this mixture in my GTO/Mercedes/Silverado and G6 with all having smoother running motors and all gaining MPG. Give it a try and let me know your experience. Follow the mixture ratio to the letter. 1 oz per 5 gallons of gas."
Thanks, I will look into this.
BTW, I am getting great mpg's out of this motor. She shuts down 4 cylinders when cruising. I average 26 mpg on these longer trips.