Had it serviced for its first service 10 months ago at a Fiat Professional approved motorhome dealer. I noticed a big blob on the drive, assumed it was from another car. But no, it's the van. I then ran the engine for about 10 mins, and there's enough oil on the drive to run. Should I take it back to the said dealer, or is there a chance that all the oil blow out getting there (it's about 40 miles)?