I've seen Mobile one 0w40 for under $4 --- but that is at auto supply stores on special -- not as part of an oil change service. My Chrysler dealer (former that is) only charged $69 last time I went in, but it wasn't necessarily Mobile one -- it was however an "equivalent synthetic oil" and seem to be when I looked up the codes to make sure they weren't screwing things up with improper oil for the engine.

Mine is due for a change soon, but I'll be doing it myself -- with Mobil One that I got on sale at AdvanceAuto for about $3.79 a quart -- with a free fleese filter as well when you buy at least 4 quarts.