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Old 08-15-2013, 10:04 PM   #2 (permalink)
ksa8907
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Join Date: May 2012
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Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
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I remember hearing bad things about such products but it has been probably 10 years so I don't remember details. Z-Maxx though is almost entirely mineral oil. Be sure to check the msds for those products.
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