Hey, I think my 5740C took over 10 quarts to get to the top of the safe zone on the stick. I do know the manual is not correct if you convert the liters into quarts. I just make the corrections in my manual for the next time. Just buy three gallons and you will have a little left to add later if needed. Hope this helps.
Just for the record, I have been scrapping some junk cars at my place. I was tickled to see I could pick up a junk Corvair, minus engine, with the loader and set it on my trailer. This machine just keeps getting more useful every day. I do have a 2000 lb. plus counter weight on the three point. It makes all the difference in the world. Have a nice day.
Jim T.