"No Oil" Keychain Tag

myminifactory

When your memory is as fleeting as that of a guppy and you tinker with small engines, the last thing you want to do is fire up an engine whose oil has been drained and forgotten to be refilled. Trust me, it's not worth the risk. To prevent this very real possibility from occurring, I've developed these keychain tags that I attach to a vehicle's key ring as soon as the oil is drained, removing them once the oil has been replenished as a handy reminder. Utilizing book or loose-leaf rings, like those available on Amazon, makes snapping them onto and off of key rings a breeze, no pun intended - but why not go with it?