Be aware that given that it's a diesel
tank, you can gravity feed from the bottom rather than lifting out the top.
The only consequence of a larger tube, if that is what's convenient, is slightly longer priming time for the lift pump
. It should not be a problem. You are not changing the height of the lift
Use the stainless pickup tube, then shift to rated fuel hose for the run to the pump
. If the tube is coming out the top, bend it over so the hose does not put a lateral force on it. The pick up tube cannot get quite the last bit of oil
, and that's good, because that's where the junk accummulates. A drain plug
or valve at that bottom allows you to remove that junk (water, usually).