How Long does the stats increase from the Lazarus pit last ?

How long ?

Years I think though the more you use it the less it last.

@ultrastarkiller: So Jason Todd still has increased Stats ?

@midnightdragon18: As long as the plot needs it. It last the same time that the madness from the pit lasts, so around 5 or 10 minutes. Jason Wasn´t revived by the pit in the canon (at least in Pre new 52, don´t know in New 52), he was revived by a punch to reality from Superboy Prime.

@midnightdragon18: Derp for some reason I thought you meant the actual effects of the pit. :P

I'm pretty sure that the super boost usually only lasts a short period.