hey guys, finally I will be sand racing my truck tomorrow and will have vids for you guys.. I have a ?.. can I hurt my engine if I let my gas tank go empty, then put 5 gal of VP 110 fuel on it? this will be my first time racing with NOS.. I'm kind of nervous.. so, should I mix 5 gal of 93 octane with 5 gal of VP, or plain VP?? thanks and I will upload the vids asap..