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Old 03-26-2012, 03:10 AM   #5 (permalink)
EcoModding Lurker
Join Date: Dec 2011
Location: Toronto
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An injectory cleaner may help in a neglected car, once every 6 months at the VERY most, but beyond that no additives have proven mileage advantages.
2001 Prius - 170,000 KM - just got it (no consistent FE numbers yet)
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