Hi we recently bought a discovery 3 and it's been great , a few small jobs and I will have to do the dreaded handbrake soon, anyway I went with mobil 3000 and did the oil , first put in the 5 lts and ran it to the filter which I believe is not a great way to do it ,anyway then I started pouring the litre to fill to the mark, well between being distracted, trying to read a very silly dipstick and being me I put in .7 of what was in the litre bottle , so in total 5.7 liters , I'd be happy but trying to read this wonky dipstick it appears I have filled it to the ball that the top arrow is printed on , not the bottom of the arrow , need I worry ?? The overfilled is tiny surely ?