don't knock it... years ago an old boyfriend of my sisters was complaining that his Honda C50 was a bit noisey, I had a look at it and told him he needed to fill it with oil, so he did........
he went striaght to our shed where my mum (I was still living at home at the time - it was a LONG time ago) kept a 20l drum of cooking oil and he filled the engine of his C50 to the brim with it
I only realised what he'd done when I came back to find him complaining that it wouldnt start.....