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Title: Stay away from sea foam Decreased mpg alot
Review: I used 1/3 on crankcase and 16 oz on gas tank. Changed engine oil and filter after 200 miles. Btw my minivan used to average 320 miles full tank. 1st fillup 260 miles, averaging 19 mpg. 2nd fill up with new engine oil and filter 238 miles, averaging 17 mpg.10% city and 90% freeway driving.Google search sea foam decreasing mpg.2003 toyota sienna88k miles
