Has anyone supplied their own oil for a service?

[TagnuT]

As the title says, has anyone supplied their own oil when taking their car in for a service?

Mines coming up soon for its first service and I was wondering if it was cheaper to supply your own oil or is there not much diff. in price?

[TeddyKGB]

You might get it cheaper as part of the service, but if you supply it at least you know they are using the proper stuff (assuming the wafty crankers don't swap it with inferior oil when you're not looking)