We've had the car 6 weeks and love it but now we have a problem. Oil leak coming from husband thinks just under the plastic cowling at top of the engine at the top of the rocker box, dripping onto the exhaust which is why we found it because it smells. Bought it from a local Vauxhall garage and it's under warranty. Husband doesn't fully trust the garage as so far they seem a bit off and dismissive.. Are there any similar common faults with this engine - and what do you experts in here think it could be? 
