I don't do much , I'm not into additives. in the winter when temps dip I'll use Isopropyl in gas tanks but that's pretty much it.
from my snowmobile days. most sled manufacturers recommend running premix till you know the oil injection is functioning properly. you usually fowl plugs if you putz along . I used to run nitrous on one of my Polaris race sled. I took the oil injection off and went to premix to have better control of my oil/fuel mix and jetting.
adding oil to the gas, ambient temps, ethanol,humidity , atmospheric pressure and water grains all affect jetting
I find myself reading plugs and looking at exhaust temps allot in my tuning adventures
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