You are not taking in nutrition frequently enough. Plus all the gels, etc... are quick energy, for before a race, quick boost during a ride, etc... For longer rides you need more then calories. The best stuff is Hammer Perpetuem:

http://www.hammernutrition.com/za/HN...0047&AMI=10082

make a milkshake bottle and sip on it all day with water in your other bottle. There is a ton of great stuff on their web site about long distance nutrition.

Real food is good too: PB&J, banana, apple, raisins, a baked potato saved me at lunch last year on the RAIN ride (160 mile ride across Indiana). After sipping Perpetuem all day I WANTED something different, but it kept my base nutrition good and felt great after the ride.