She might be dead

[supersquid]

For the past month my baby has been burning oil like its going out of style (to the rate of like a quart every 100 miles) and I read that I would need to tighten the bolts on the head because it might be leaking oil there. There was a little bit of oil residue so I tighten them up to factory torque specs and hoped for the best. She let burning oil, and now on my way to school she started dying when I'd give her gas. It ended up taking almost 20 minutes to go a mile and a half in no traffic ( usually a 5 minute skip and jump) because I was limited by when she'd go and when she wouldn't. Are these any problems any of y'all have experienced? Is she a project bike now or would a rebuild be in order?