I use the Prestone Extended Life. Phosphate/silicate free. I then buy a jug of distilled water and mix 50/50. I have seen the "pre-mixed" on the shelf as well, you pay a premium for that 1/2 gallon of distilled water.
Jimbo. 1800c, Drag Bars, Drag Pipes, Chrome Wheels, 31T Ring Gear, BadX Extreme Seat, SOTMC Shocks, 200 Rear Tire, Elimination of all Non-essentials, Kingdom of Kicks.