Drove round to the shops a little while ago (15 minutes there and back) and when I parked up thought id lift up the bonnet to have a nosey around due to the engine 'shaking' issue ive been having. Anyways, the engine wasnt doing it so I thought id make the effort worthwhile lol and started checking fluid levels etc. Anyway, took my oil filler cap off and theres a tiny bit of smoke coming out. Is this normal or have I got another problem with my car!!? Anyone else with TDi noticed this? Engine was fully up to temperature btw, and there wasnt any mayo etc before anyone suggests head!