Ok - don't yell - but I change my oil every 5,000 miles - very easy to remember. I tow only a very light boat - use the good strat filter - cummins blue oil - have 49,000 miles in 11 months. Now - what should one expect in oil consumption, i. e. a quart in 5,000 miles - a 1/2 qt or what do you think. It has to use some - heck the breather where it blows by uses a little.