My wife was running some errands today, so I gave her my owners manual and asked her to pick up some oil for the crank case of my 50 hp 4 stroke Johnson, as I plan on changing the oil myself today (in the past have had the pros do it). It needs 2.2 litres. Wife just called me and said at Cdn tire the equivalent motor oil Sae 10 W 40 with a couple more letters tacked on (ie not "johnson" or evinrude) only comes in 946 ml containers and its over $20 a bottle (I think she said it has a motorcycle on the bottle). Need 3 bottles, with tax this will be over $70. I never paid attention to how much the oil was when the pros did it but does this sound correct? i kind of figured I'd be getting one of those 1 gallon jugs for twentysomething bucks