Stupid me, before I knew what I was doing I poured about a quart-plus of regular gas in the almost empty tank. Dealer advised to drain tank but said probably wouldn't do any significant damage. So I went ahead an filled up the tank with diesel including the JD C-tain additive. But still wondering if anyone has done this and if their is anything to worry about. I can still have the tank drained if advisable but its a mess doing it and if the risk of damage is next to zero I'll just run the tank till 1/2 empty and then refill. Any one have any comments besides the fact that I'm a dummy??