what size ID for oil feed/return lines
 

3/16 or 1/4?
should the return be bigger than 1/4 even?
bigger than the feed?

Re: what size ID for oil feed/return lines
 

I'm using -3AN oil pressure lines for my setup. The standard us usually -3 or -4 AN.

Oil drain line should be no less than a -8AN. You want the drain to be as free flowing as possible.

Re: what size ID for oil feed/return lines
 

-8 = 1/2

Just a little heads up
Randy

Re: what size ID for oil feed/return lines
 

Yea, forgot to mention that the AN fittings are sized in XX/16"

-3 = 3/16
-4 = 1/4
-6 = 3/8
-8 = 1/2
-10 = 5/8
-12 = 3/4
-16 = 1