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if the difference in price is $0.10/gal
and you get 20mpg
and you drive 12,000 miles/yr
that means you're using 600 gal of gas a year
if you're saving $0.10 a gal by cheaping out to lower-than-recommended grade, that means you save $60.00 a year, or $5.00 a month
not worth it...
even if the difference is $0.20/gal, you're still only saving $10/month...
one less lapdance every other month and you can still put in the good stuff
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