If you have just serviced it and only done minor kms since. pull your oil filter off and cut it open with tin snips or bIf you've just ig pipe cutters. Don't use a hacksaw for obvious reasons. cut a slit down the the paper filter and pull it all out and try not to break it too much. Once you get the paper out, unfold it and keep note of which side is the inner side and look at it in daylight not artificial light. If you see any metal shavings at all, i'd be pulling your motor down. This is pretty much the only way to be 100% sure you've got a serious problem. I do this on every car I own and I work for caterpiller so I have to do this to every machine I get and its never failed me. good luck!