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Welcome aboard.
Getting the most out of your car (mpg) is important.
However.
Getting the most out of your car would include not wearing it out.
180 miles x 5 days = 900 miles per week
900 miles x 4 weeks = 3,600 per month
3,600 x 12 months = 43,200 miles per year
3.5 hrs per day driving x 240 days = 840 hrs.
840 hrs. / 40 hr. work week = 21 weeks
^^^Wow.
^^^
Maybe you should consider moving closer to your job or find something closer to your present home.
Check this out.
The True Cost of Commuting
Have a Great Day....
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