A Honda CRF-50 uses a 10w30 four stroke motorcycle oil. You should not use a truck or car oil in the CRF-50.
10w-40
10w30 four stroke motorcycle oil. do not use car or truck oil!
5wt oil. Use Honda oil.
Regular unleaded is fine. It's a 4stroke so you don't need to add oil.
API SM oil is the kind of oil that a Honda CRF150f should use. Make sure the SM oil is either 10W-40 or 10W-30.
about a liter
10w40 oil if you are using a non-honda oil. We just switched our crf's (2 of them) to Amsoil and I can honestly say we felt a difference in the first 5 minutes!
I had an 1986 Honda shadow VT1100 (loved it) and I ran mid grade with no problems. You can run 87 octane with no problems.
My 2004 Honda uses 5w-20 . Use a good quality detergent oil listed for gasoline engines.
always use four stroke motorcycle oil. valvoline, castrol, Honda etc. I use 10 w 40. 20 w 50 is a little too thick unless your motor is worn out. NEVER use oil for cars and trucks.
Any gasoline rated at least 87 octane.