How Do I Thicken Engine Oil?

I have a Hyundai Sonata that has a bit of a lighting problem. Lately, the dome light has stayed on, regardless of whether I close the door or the dome light is in the on or off position. How can I fix this problem?

My new Chevy hasn’t been in my driveway for more than a week, but it’s leaking a puddle of weird liquid. It doesn’t look like oil, so I think it must be coolant from the water pump. Does the Chevy powertrain warranty cover a water pump?

Will USAA pay for a car rental? My car was recently hit by another driver and needs extensive repairs. USAA told me it isn't totaled, but I need to get around somehow while the car is in the shop.