[nicky g]

I know very little about O8, but I'll have a stab anyway based on advice I've read:

If you think you can get someone to fold on the turn, then you should raise the max to knock them out and get heads-up, as it's quite difficult for one opponent to have you beat both ways. Otherwise I think calling is probably OK, given the small bet, but I think it's likely you're beat both ways, especially by the river.