The 30 mile commute is what’s killing you.
I average 15mpg over my 2.5 mile commute. All 35mph zones, stop signs, and lights. But it’s only 5 miles per day. 5 miles * 5 days * 4.33333333 weeks per month = 108.3 miles per month commuting.
108.3 miles / 15mpg = 7.22 gallons of super unleaded a month.
A whole $32.50 a month @ $4.50/gal.
See, you can be a conservationist and drive a big V8. 