hi all, have a L3901 i bought used ( had 55 hours on it), and am doing the first oil change since i have had it. got the correct filter from the dealer, and correct oil and all that. the owners manual says 7.1 quarts for this model kubota. i drained old oil, and when i put in the new stuff, i stopped at 5 quarts or so to see how full it was. the dipstick says right up to the fill mark. the manual says sometimes you have to run it a bit and check it again. so,,, i run it five min at idle, shut er down and check it again after 15 minutes. still shows full on dipstick. any ideas? this leaves me 2 quarts below spec. but shows filled up.