I think Martin's (the permethrin at Tractor Supply) has two concentrate solutions. One contains "petroleum distillates" which is the odor you mention. The other doesn't. I don't remember if they are both 10%. I'll checkDoes your homebrew permethrin leave an oil/diesel-like odor on your clothing? I've diluted the 10% livestock pour-on version sold at farm supply stores down to 0.5% and soaked clothes in it. It worked well for repelling ticks, but left a pretty strong (and persistent) odor behind. The smell isn't a deal breaker for me, but if I could find an odorless DIY solution, I would use it.