A motorcycle can save a lot of gas relative to a car. This is fundamentally because it is much lighter. Choosing the right vehicle for the job can be a great strategy to up your fuel economy. A lot of people hold back on a motorcycle due to two big issues: safety and space.
As far as safety goes, if you use your motorcycle for local trips and avoid heavy traffic situations it will not be as risky. For passenger and cargo space, a sidecar could be just the thing. Now a lot of people say they do not like sidecars, that they look bad. Well, just to dispel this excuse, I have posted here a picture and a video of a motorcycle with a tricked out sidecar. This sidecar looks like a car!
Here you go: proof that a motorcycle can carry passengers or light cargo and look snazzy doing it! So consider using one when appropriate to save on gas.