Hello everyone. I own a 2012 Nissan Versa. The car has 23500 miles on it. It is driven mainly on short trips around town with a road trip maybe once a year. Well this month alone the car has been from VA to AL and then from VA to SC. That has happened in the last two weeks. I change the oil and filter in the car based on the Nissan OCI of 3750 and do not worry about the months. The oil in the car has always been clear to light gold on the stick. Now after all this road trip stuff the oil is dark brown and smells of gas. Is that normal? The car turns nearly 3500 RPM at 70MPH with the 6 speed manual. It still got 42MPG on the highway even though it was turning up so hard. Is the darker oil normal? The car has SuperTech Synthetic 5W-30 and a Puralator Classic oil filter on it.