To make things worse, I called multiple Cfmoto dealers nationwide today to poll them on what amount of oil they put in at a service. I got all sorts of answers. Everything from start at 2.5, start it and then top off until full, check it as soon as you cut it off and then one told me to check it after it sits overnight. One dealer (very large well known dealer) told me to buy the gallon jug for the 800 and that it takes most of not all of that. I’m more confused now that I asked. So far I’ve been using 3qts for the 800ex and 2.75 for the 400 and 500 Cforce machines. It’s slightly overfilled when cold and sat a while and just under the full line when run and then checked. Hope a 1/4 qt either way doesn’t hurt anything.