I admittedly round up in .5 increments. I may be a terrible person but it hasn't given me any trouble
One car takes 4.2 and I usually put in 4 "and a half"
my wifes old car tool 4.8 and I always put in 5 ish, unless of course I had a left over half quart from above car and then it only got 4.5
Maybe I should get one of these
