you do not have to remove the exhaust to change the oil. My trick and its also on the diy vids too is to place aluminum foil over the exhaust and fold it into a channle to direct the oil into the pan. the only one that really hits the exhaust alot is the rear drain. The primary doesnt make a big mess and isnt too terrible. also use foil for the oil filter. it makes clean up a breeze. 1qt int eh primary 2.5 in the rest. filter change should take you total 30 mins. good luck