Hi everyone, I've spent weeks researching what oil for my car to top it now its been serviced. It's been serviced with 10w 40 according to the paperwork and when I asked for a top up I waited 2 days for the garage "listers evesham" to talk to seat to get the right stuff. They've given me shell helix hx7 10w 40 ? Vw spec of 502 and 505..... What's everyone saying ? Doesn't sound right to me and the car runs so well I song want to mess it up. Thanks in advance!