Viscosity. 5W-30 is a "thinner" oil than 10W-40 is.
5w-30
The 10W 40 oil is thicker and is thought by many to be more efficient.
The 50W is not a multiviscosity.
5W 30..bro
Yes
5w-30 recommended but 10w-30 is straight
5w-30 or 10w-30.
5W-20 is slightly thinner than 10W-30. many manufacturers have switched to recommending 5W-20 due to the fact that it doesn't hold as much heat as 10W-30. The cooler you can get your engine to run the better gas mileage you will get, and the longer your engine will last
about 430ml of 10w (manual says 5w but everyone is using 10w, even shops recommends 10w)
you can use 5w-30 or 10w-30 motor oil
10W 30 or 5W 30