I've tried two other fuels in a Zippo.

91% isopropyl alcohol (rubbing alcohol): Worked fine. was able to spark up fairly easily. Also evaporated fairly quickly from the resevoir. Note: rubbing alchohol comes in 2 strtengths, 70% and 91%. I have a feeling the 70% may be too dilute to light w/ the sparker.

Liquid parrifin (lamp oil): could not light it from sparker.

Dave