I agree with the oil, after a few K miles, still looking can-fresh..Mobil 1( 5-30 )in mine with a WIX #57674 filter. Your mileage is very similar to mine as I do a lot of ecno-planning ( coasting) where safe and possible, and I rarely shift thru all gears as terrain allows. Thanks for the tip on the 2nd desgn of the upper strut as I was not aware of it. When I change oil at 5.5-6.5 miles, I stick my air comprsesor tube in the dip stick tube and blow out the low spots in the oil pan. With filter, pan blowout and letting it sit on the ramps for several hours, it takes (5) qts. Good luck!