I have had mine since 2013, Jamie shipped Lucas oil synthetic 75W-140, and that is all I have ever used , have a little over 10000 miles on it now, we had tried 75-90 for a short period of time but they recommended going back to the 75W-140. Did you not receive oil with it ?, and 3 1/2 qts is about right, it will not be to the fill plug unless that has been lowered