Saturday January 4th flew from Oakdale to Rio Vista. It was a warm 46 degrees when we broke ground. Our route took us east of Stockton and turned left just below Lodi. Had a head wind for first half hour and was making 34 mph, changed altitudes and got up to 38 took 1.6 hours of flying. At 3,000 rpm was using 2 gph. Return trip later in day was in mid 50's and had a tail wind, showing 68 and 70 mph. Flew a different route, down thru the delta, west of Stockton and to Oakdale, took 1.2 hours and at 3,000 rpm used 1.9 gph. Great day of flying. On the way to Rio Vista had occasion to view some geese at altitude. They were moving slightly away from me but i am beginning to wonder if I can keep up with them.