Took ours to the local frightliner dealer, they charged us 260 for the engine oil change, filter etc. They also had a lift that lifted the HM and did a complete inspection, i.e. Lines, breaks and found a break gasket leaking and fixed it under warrenty. Don't know how much is cost you for supples etc. But the full under inspection was worth the extra cost.
2011: 54 days, 2012: 218 days, 2013: 175 days, 2014: 196 days
2015: 188 days, 2016: 72 days,
2009 Berkshire, 390QS, and toad