I am talking about the left over oil from refilling the car. Since I usually buy 5L bottles, From the 01 corolla I get about 1.5l left over and the datsun (L18 engine) I get about a litre
However I have been known to use the sump oil from the corolla, The oil from the car after 10000km comes out slightly darker than when it went in (like golden syrup than honey)
A lot of the very sad briggs motors I have come accross over the years the oil is like molasses, so thick that it can take up to an hour to get most of it out, and then you still have to rinse the crankcase with diesel to get the rest of the crud out of there. Then the effort to wash that "muck that might as well be tar or black axle grease" to wash off your hands is another story.
Funny thing is though, with this old thick stuff running in the system, old briggs engines don't smoke at all and seem to run fine, once they have fresh oil in them though, they can sometimes start smoking a little as the new oil is a lot thinner.
One day we should have the competition "who can find the most neglected engine that still runs " :p
