I also find oatmeal staves off the hungries for a long time, better than anything else I can think of.
Forget the oatmeal, and have Steel Cut Oats. Less processed and will keep you fuller longer.
Also if you want to eat before you ride into work (don't know what you ride is like, any climbing involved?) the last thing that you should be eating is sugar. You just woke up and so your body is naturally hungry. By not eating, you are basically starving yourself. Then you throw sugar into the equation and you are crashing when you get to work.
I commute everyday that I can, which ends up being most. On top of that I put on anywhere from 150 to 300 km a week on the bike. I eat when I get up in the morning (before I ride into work) Steel Cut Oats with raisins and pecans, and then have a snack (usually an apple or two) before lunch which happens around 11:30.
By the time you have gotten to work, your body is in deficit of nutrients. You are trying to catch up the entire day.
Give eating before you ride into work a try. It worked from me, but everyone is different.