So, I have 22" overfinch supersports which according to overfinch, should be at 4 psi over the standard 20's

Car went for a service (another thread exists with those issues) but went for my weekly fill up after this service and noticed that all 4 tyres were low. Actually, all 4 tyres were spot on the pressures listed on the door. So, is it just a miracle that all 4 tyres lost 4 psi each in a week, or did the dealer check the pressures on the clearly aftermarket wheels and let air out until they matched the door card details

I guess what I am asking, is this - during the service I assume tyre pressures were checked, and despite the wheels clearly being non standard, they knowingly let air out of all 4 of my tyres....or is this not checked in a service, and genuinely all 4 tyres have lost pressure and i need 4 new tyres..

guess im alone on this then......!

In my experience it's pretty standard for the servicing clones to perform every task to the manufacturers specifications, and tyre pressure is just one of those jobs.

I've had both Audi and Land Rover do exactly as you've described with the tyres despite me asking them when dropping off the car to inflate the tyres to a certain level. I guess they're trying to cover there own arse by inflating to what the manufacturer says, even when it's clearly not correct for aftermarket wheels. 2008 TDV8, Stornoway Grey with Alpaca premium leather, Adaptive cruise, Adaptive Bi-xenons, sunroof, Premium Nav, Premium ICE Logic 7, telephone, active locking rear diff, console coolbox, seat memory, powerfold mirrors, tow pack, window tint, dual battery, engel fridge, Goodyear Mud-Terrain tyres.