su carbs, do i need to replace oil?

[Ophitoxaemia]

1973 240z, rebello ITS motor (mostly stock).

ive swapped my race and street floats and there is a little red oil in there. how much is supposed to be in there, what type of oil is it, and how critical is it that i fuss with it?

driving 200 miles today, please reply!

thanks,

-james

[Dan]

There are varied opinions on what oil is best but i think a 20W will work well. I've used 20W in mine for a while and have always had good performance. Some people use tranny oil and so on. As to how much to use i just fill it to about 1/2 an inch below the lip, any overflow will just run off down the side of the piston, no harm no fowl there.

[2ManyZs]

Sounds like someone used ATF since the oil is red. If you put 20w I would try to get all the ATF out or just use ATF. It probably would be better to not mix them.