[n00b on demand]

I took the car out to school this morning and just got back. Drive is about 20 miles round trip. I got under the car in my driveway and its dry...no dripping anywhere except for some water dripping down because of all the water in the road. I have no engine undercover as i removed it when we installed my tranny cooler. Under the car just looks greasy as it always has. Little sigh of relief . And no im not going to add anything...i just wanted to see what people thought. What exactly is so good about the high mileage oil anyway? I used Mobil high mileage 10w -30.