[Tom Goldman]

I agree with Paul , the PTFE hose lasts in our applications, but I've only used it for the main pump to regulator fuel line .
The new cloth covered lightweight stuff ,I've seen deteriorate in as little as two years.
The cheap Chinese "House Brand" hose the Speed Giants sell really deteriorates rapidly , I've had cars in the shop that had it on only one year and it was getting hard and loosing its flexibility .
Bottom line is if you think it's too old, replace it .
A couple of feet of quality hose costs way less than chasing a phantom performance problem or replacing a car due to a hose failing .