When the turn card doesn't change anything heads up

[cartman]

I open-raise from any non-blind position and get called only by the big blind who will defend with virtually any two and doesn't like to fold postflop.

I have a hand with very little showdown value, like Q[img]/images/graemlins/spade.gif[/img]9[img]/images/graemlins/spade.gif[/img] or J[img]/images/graemlins/spade.gif[/img]T[img]/images/graemlins/spade.gif[/img]. The flop is all low, 8[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/heart.gif[/img] for instance. He checks, I autobet, he calls. The turn card is 6[img]/images/graemlins/diamond.gif[/img].

In a situation like this the turn card has likely done very little to change my opponent's opinion of his hand for the worse, hasn't it? Basically whatever reason he found to justify the flop call can still be used to justify a turn call, right?

Same thing if the turn was 2[img]/images/graemlins/diamond.gif[/img], right?

Should I just be checking the turn in spots like this, or do you guys think that I have some folding equity?

One last question. What if the turn is 6[img]/images/graemlins/heart.gif[/img]? Now do I have some folding equity or is this even worse?

Thanks,
Cartman