Q: The digital clock light went out. Is this a fuse issue or bulb? on 2004 Subaru Forester

Motor oil,,,, is full synthetic required or a blend??

just had AC evaporator replaced. not sure if this has anything to do with it. the hissing sound comes on for about 3-4 seconds every 4-5 minutes or so.

Few days back i was driving and i heard a strange sound suddenly coming from the car. when i stopped and opened the hood i noticed that Alternator belt had snapped since i was on the highway i drove car for few kilometers & stopped at a safe place and got belt replaced on stop by mobile mechanic team. By that time battery was completely drained and i had to jump start the car. It worked smoothly on highway but i noticed that while car stops or slows down at signal (red-light) it seems to loose power but car doesn't shut off. i also noticed car engine turn off while reversing (this happened only twice in few days) Today i noticed warning light showing up for half a second when i stop at parking area and light goes off when completely when i turn off the AC. I started having these problem after changing the Alternator belt. what could be the cause of this problem as i can sense something but don't know what it could be Light which show in yellow AWD Vehicle Dynamics Control System Light which show in Green SPORTS Light which show in RED AT OIL TEMP These warning lights show up for half a second & then goes away & comes back till AC is not turn off.