I have a 5qt. jug that has a variety of oil brands and grades. It’s mostly 5W30 blend and synthetic. It does have some 10W30 and 20W50 VR-1 mixed in. I use 1litre of it and 1 litre of Rotella T5 15W40 for my Yamaha powered Gravely. It’s what I have and when the excess oil jug is used up, I will use T5 15W40 exclusively.