I tried reading through as much as I could, but I'm not understanding how to know the proper grade to use. I just filled up for the first time and put 87 in by habit. I could figure out a way to drain it if necessary.
What are the basics? Go by manufacturers recommendation for grade and avoid additives/ethanol?
I talked to my uncle today who told me ethanol will prevent rust in the tank... not sure what to make of that.