Hi everyone.Recently purchased a TD4 and everything was fine until I noticed a loss in power at about 3000 revs on M1.Got home and found oil leaking out onto driveway! car was smoking quite badly too. However when ticking over I tried to locate where the oil was coming from I could not see any visible signs of oil leakage which was baffling. A friend suggested turbo failure, but when he removed it for examination it seemed fine and he suggested that the intercooler was sucking in oil,so maybe a seal or something had gone? My friend is no expert so I wondered if anyone out there could suggest any problem before I invest any more money. Hope someone can help.Thanks,Andy.