When you check the oil, how far in do you push your combo dipstick/oil cap? To fully close the oil adding hole, it screws in about half a turn on top of the tube. When you check the oil, do you take it out, wipe it, push it back in AND screw it in that half turn, or do you just push it 'till the cap touches the top of the tube, and then pull it out to check the level? I know this sounds silly and anal, but I'm not sure how to get an accurate oil level reading. Please help!