Every reference I can find agrees with the manual, which I have. It seems like the dip stick is too long or the tube is too short or shoved down into the engine too far. I found the parts number for the stick and tube, wonder if the other engines all take same part. Mine has a yellow ring at the top and a knob near the bottom with the hatch marks and the word safe in between the hatch marks. Just went and measured the level and cold sitting over night level is in fact 3/4 inch over the top hatch mark. Can different filters make much of a difference in cap. can't imagine they would. Does the tube just push into the engine? Can it be down too far?