[Canadian ST]

Well I've been reading my service manual for my 08 and it states that oil changes are to be done ever 12'000km with semi synthetic oil. I personally think that is a rather high amount of km between changes so I called my dealership and they recommend to do every 8'000km. 8'000km seems a lot better then 12'000km so I asked what the price is...$84.99 for a semi synthetic :o What the hell!if it 34.99 for a regal oil change how the hell do they expect to charge $85??? Wal-Mart charges $50 for a full synthetic (don't know if I want to take it there) Can you guys give me any advice on this or a place that does good oil changes and doesn't charge up the #ss.

Thanks in advance