My mothers 4 runner has the 4Liter engine.

Is it ok to go with 6 quarts with filter change of course for regular oil change or 5 quarts?

I DON'T LIKE TO WASTE HALF A QUART IF YOU KNOW WHAT I MEAN?

P.S. when are they going to stop this .5 quart thing on oil changes, we like whole number so round it up or down TOYOTA!!