1/2" inside diameter is a sufficient oil drain line. I don't know if your hose is 5/8" inside diameter but 1/2" is way big enough. With 5/8" hose your outside diameter is 7/8" or more with the braiding, probably closer to 1" OD.
Its no wonder it will hit everything from the turbo to the pan. 1/2" hose will still be almost 3/4" OD but fit much better between stuff.
That is the reason I made my drain from copper tubing and elbows, so that it had an OD of about 9/16" and wouldn't burn through at all. IN fact, that copper drain I made in 2003 is still good.
Beat that suckas!
