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my car has been really slugish since i bought it with mixed driving as in hard/ normal since i bought it, ive put many highway miles on it and some city with 28k miles on the car im barely averaging 30 miles per gallon. On the highway ill get 32 tops, but if its all city i will only get about 27 miles per gallon, with the slughish performance and im using synthetic oil would you guys suggest I do a round of seafoam treatment on my car???
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