That is the plus, and the minus. For short runs, it isn't much of a problem, but for long runs, say 15 feet, you have to watch how you handle it to keep it from sagging.
It does polish up very nicely.
The old line and the Cu Ni side by side.
The Label on the package:
One other downside, is it is pricey, about double the cost of steel lines. Around $50 for 25 feet. (I paid $46 due to the guy misquoting the price. )
But if you are going to the trouble of replacing your lines, and bending new, it is a worthwhile investment. Most newer cars run the line(s) above the fuel tank, so dropping the tank is a must, if you are doing it right. It is way too much work to have to re do in three years or less, using the "painted" steel tubing the sell.
And it is stronger than steel tubing.
Current production steel tubes passed the 60-cycle requirement but failed well before 120 cycles. The 90-10 copper-nickel tubes completed 200 cycles with essentially no reduction of their original burst strength.
(3,000 psi)
http://www.copper.org/applications/auto ... _tube.html
AutoZone/Advance Part Number: CNC-325 same price either place.