Mild Steel or Stainless Steel Fuel

I am purchasing a flaring tool to rebuild my brake lines using an fittings. My brake lines will be mild steel. However, I might as well rebuild the fuel lines as well and I am not sure if mild steel will work or if I should upgrade those lines to stainless. I don't see a problem with mild steel, but maybe you guys have better input into the fuel line material.

Stainless is a much harder material and I would need to spend $75 more on a tool that can flare stainless.

Edit: forgot about aluminum tube as well...
 
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I don't use stainless toob for either brakes or fuel, but then I don't do trailer queen stuff. Given normal maintenance, plain old "brake toob" will last two of yore lifetimes.

Picked up a 25ft. Coil of 5/16" brake toob ($16 at brooks) last week to run uncle ed's plumbing since his fuel tank is gonna end up bein' a total re-work. I gotta fab a replacement sender for it as the oem unit is one big pilea crap that is not worth putting any effort in. The donor sender is a passenger-side tank sender for a squarebody peekup.

Why use an fittings and plumbing? Yore gonna be chasin' yore tail tryin' to deal with scruuball adapters/transition fittings.

Columbia airmotive in troutdale right overlooking I-84 has thousands of pounds of surplus an shit for dirt cheep. Ya gotta second job now to pay for this an shit???
 
Columbia airmotive in troutdale right overlooking I-84 has thousands of pounds of surplus an shit for dirt cheep. Ya gotta second job now to pay for this an shit???

Really? That is right up the road from me!! When I worked for a summer at an fbo for a friend I remember many trips up there.
 
really? That is right up the road from me!! When I worked for a summer at an fbo for a friend I remember many trips up there.

Couplea good 'ol boyz continuing a business begun by their father peddlin' surplus flyboy crap post-wwii. Fun place to visit and they got alotta kool crap to finger! Definitely our kinda folks!

columbia airmotive - troutdale, oregon

They actually have all kindsa stuff that could be used on dealin' with junkiron!
 
Mike has it right on here regarding brake lines. Stainless is for effect rather than function, and would certainly be expensive. As regards an fittings, I have done this before and it proved time consuming to get it all together and expensive. I will not do it again.
 
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