Ahh RT, you have the wrong attitude! The oil will be hot and full of diesel so you put a leetle hose on the valve and put the other end in an old milk bottle (or whatever) and go pour yourself a beverage, watch the sun do its thing and sometime later, after you are suitably mellow, you go back to where your engine is stored, close and lock the leetle valve and pour in the premeasured amount of oil (you never remove the level plug because being British, it's going to strip too). Ergo bingo, all is good in the world and depending upon your choice of beverages, you have a useful bottle to drain Simms oil into the next time.