synthetic oil?

[Longhorn Man]

Originally Posted by 68w/sbc406

you could change it at 6000 miles and change your filter at 3000

Kinda yes...kinda no.
The oil filters are made mostly for removing solid particles from the oil....it doesn't do much in the way of removing fuel and/or the acid the mixture creates.
But yes, you can extend the life of the synthetic a little in a carb'd engine by chainging the filter.