Well, Mike since nobody has asked, what kind of a car did you buy?
I am in a similiar situation. I work as a carpenter and having a truck is part of the job. I purchased the smallest truck that would do the job and only use it for work. I would really like to be carfree and I will be in the future but this will require a change of employment.
If your looking to save money on gas buy regular grade instead of the higher grade gasolines. The only difference is the amount of octane and unless you purchased a Viper or Corvette a new car should run fine on regular grade.
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"only on a BIKE"