I'm trying hard here to see an actual benefit to the end user, other than maybe feeling better for allegedly creating less pollution? What benefit would you have by using this???

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2007 Dodge Ram 3500 Cummins Turbo Diesel 4x4
1994 GMC S-15 pickup 4.3 5MT
1985 300 SD
1978 300 CD
1962 220-S Fintail - awaiting restoration