DIY: Fire Starting Fluid?

So on my last hike, as i finished up my setup routine, i spotted a small Nalgene bottle (about 1 oz) hanging on a branch next to my tent. I grabbed it, and noticed there was about half an ounce of a dark red, almost black, solution. Not thinking it all the way through, I open the bottle and immediately sniff the substance to see what it was. It REEKED of Isopropyl, but was thick like that of Two Stroke Engine Oil. Thinking to myself, I realized it must have been some sort of fuel/fire starter. So I placed a small amount in the fire pit, put a match to it. Immediately it ignited, and burned for a good minute or so. There was very little smoke, if at all from the liquid. And it didnt smell like any Petrol compunds. Seemed to burn very clean.

My question is... Does anyone here make their own firestarting fluid, or know of a brand sold that resembles what I just decribed? I would like to make or buy some as it worked so well when I decided to use it to start my fire that night. Just a small squirt got a bundle of damp kindling going in no time.