A better lubricant on the cables is TRIFLO. It comes in a spray can, very expensive but an excellent lubricant. WD40 is not a good lubricant but it is a displacer of moisture.
My black valve is a 2 finger pull in and out but the gray valve takes both hands and pulling and then pushing as hard as I can. I am not looking forward to having to replace it when it eventually "craters".
I have tried the oil in the tank thing and it helps for a time or two but there has to be a root cause of the valve being so tight.
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2012 Jayco 40FER Bungalow TT
2004.5 Dodge 3500 DRW 4x4 Quadcab CTD 325/600 6 spd 3.73 HiJacker Hitch;Access bed cover; Prodigy; PacBrake; DZ boards;air horns;Westach combo gauge;Sirius;Smarty Jr, Lite Force road lites
Yamaha iSEB 3000 genset
Start Out Each Day Real Easy.......Then Taper Off
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