Nautique Promo boats for 2016, it was either the 5.3 or 6.2. I have a few sets behind my 2016 and so far really like the 5.3. It is quite and have not has any issue with it gassing me (just getting back at it, so still feeling out skiing too). I run B2. Have not run through enough gas to make a determination on usage yet.
Can't wait to get more sets behind the boat, but rain this weekend in Nor Cal.