I have a pair of Chrysler 360s in my 79 TROJAN Tricabin. Both have about 1800 hours on them and neither burn a quart of oil in a season. My question is the port motor burns alot more fuel than the starboard. (the genny runs off the starboard tank) I mean about 10% more . Any ideas. Both run strong and i kind of beive in leaving well enough alone but...