Service Costs. What are you paying?

SPEEDCO?? Run as fast as you can, was quoted $200 for both diesel and genny oil change/filter/lube + fuel filters on both. Walked out the door with $480 less in my pocket due to 'up charge' that were not approved by me, and a check engine light after repeated starting attempts (it finally started, but was told to go to a dealer to clear the idiot light). The truck shop across the street laughed when I asked about this, and said they would do the same for $150 labor + parts/oil.