<strong>Yahoo Message Number: 5438</strong>The local Cummins and Freightliner dealerships charge us RV'ers outragegously (I think). They pad their $90.00 hourly time cards and charge about $3.50 per quart of oil which I can buy at the local parts store for $1.50. So a simple oil & filter change can easily run $250.+. After a couple of bad experiences I decided I can DIY and on my way...