Update: Had contact back from Seat Customer Service but nothing definitive to report yet. The representative was going to contact the dealership for clarification of some details so I can find out exactly what warranty I have on the new engine and the work done as even he wasn't sure! I've not heard anything from them since last Monday (7th May) so I'll be giving them a bell tomorrow (14th) to see what's happening. On a different note though, was travelling down a local bypass on Saturday afternoon and I commented to the wife about a horrid smell we got briefly through the vents. Next thing the vehicle behind is flashing me and at the next exit, they peeled off after me, the kind driver said there was a foul smell came from my car and stuff came out of the exhaust too! I stopped at the next opportunity and had a look under the bonnet, nothing seemed out of place or obvious and the exhaust tips were dry, not wet or dirty inside. I took it easy on the journey home and had a better look this morning (Sunday). I couldn't get a reading off of the dipstick, the oil was passed maximum. Luckily I have an oil extractor here so I drew out approx ½ litre and dipped again. Oil level was still above max at this point so I drew out another 250ml or so. I could now read the oil level on the stick and it was near the top of the dimpled area, so I reckon the car had between ½ to ¾ litre too much oil. Now bearing in mind I've done about 150 miles since getting the car back, albeit nearly all at 30mph or less, should I be worried about possible catalyst damage? I've took some photos of the dipstick before and after and I'll definitely be saying to customer services when I phone them tomorrow. You'd have thought given the nature of the job, new engine, failed cambelt tensioner etc. that the dealership would have pulled out all the stops to make sure things were done right this time around! Seems not, I'm not impressed, faith in the car and the dealership is well and truly dented now!