After seeing it on a thread last night i gave it ago today!

Had some old oil in the shed after a service on my van so put it in my sprayer and filled the rails underneath until it was leaking out everywhere lol

Ruined a perfectly good sprayer in the process and thinking about it i should of just used a old washing up bottle but never mind!

Anyone else do this?

Prevents rust and gets rid of old oil both for free, result!