2008 Honda Civic LX - Oil Change (Conventional/Synthetic)?

I just got my oil change done today at Valvoline because of winter, otherwise I would just do it myself. They asked me if I wanted conventional or synthetic. I went with conventional because that's what I always have used. Is it safe to use synthetic oil in my car?

How to drive a honda civic hybrid car with out hybrid battery?

Bought a car about 4 months ago and the battery is now dead. I check to make sure its not the normal battery and Auto Zone said it was fine. I'm sure its the hybrid battery but i don't have the money to pay 1,000 or more for a battery on a car i just spent money on. Is there a way you can drive this car without the hybrid battery? Or dose anyone know a place to get these batteries cheaper?

Can a bad map sensor cause my car to not run?

I have a 1990 honda civic with a b18a1 swap. My car idles fine when it wants to start but whenever I press the gas it sputters and putts it doesn't put out enough power to move the car. I have recently changed the fiac and fitv so that's hopefully not the problem.
I smogged my car and I failed in the CO ratings so I'm running really rich with the occasional backfire. I'm just wondering if I have a bad map sensor.

Should I risk driving to work this Saturday?

I heard from someone that there's a chance of it snowing where I live this upcoming Saturday. I have a 2003 Honda Civic and I have no experience driving in neither snow nor ice. I can drive well in the rain, but have never driven in snow/ice. Should I risk driving to work or should I play it safe and stay home and call in (which means say I can't come into work)?