BTW if your insisting on WD-40, forget it, GT80 is a better option that wont gum up over time and is a little cheaper.
I just pulled a printer's press head out of storage, it was covered in WD 40, and sat for about 4 years inside a box. The WD 40 is NOT gooey, in fact, it looks exactly the same as when I put it in there. So WD 40 WILL work just fine. Also, looking at the label on my fuel, it says "DO NOT USE AFTER RUN OILS, MORGAN FUEL CONTAINS A RUST INHIBITOR, AND AN ANTI-OXIDANT FOR RESTING ENGINES"
AFO is USELESS when you use good fuel.