Has been running fine til today, started this morning and cut out after 5 seconds, did that aprx 10 times til I left it, checked everything under the bonnet, oil was on minimum and was checked 2 weeks ago so has dropped recently, topped it up started fine went out in it ran as normal, started again earlier went out ran fine, then wouldn't re start when I came back to it, left it for 10 mins tried again and it started drove home fine, any ideas? No engine lights on to indicate fault?