If I remember correctly our cables have a plastic inner sleeve requiring no lube. I don't lube mine but no surprise there. Never had any issues either and still running all the original cables. I even have an extra speedo cable because i thought mine broke a few years ago but turned out to be the drive at the wheel.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!