It had the 4yr major service at sytner back in July last year and I’ve done just over 4K miles since so I’m not sure if it could be oil that was spilt back then or something more serious? Cars done 35k and there’s no sign of milking on the filler cap. Looking at the engine it seems it’s turbo side but above the turbo, gasket area but also along the length. It is in an area below where it would likely go if you missed the oil filler cap and I don’t seem to be using any oil according to the on board oil measure. I’ve tried to picture it below but it’s hard to see. I can take it in as I have the extended warranty albeit I’ll have to pay the first £250. Any ideas? Anyone seen anything similar or experienced the same?