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Old 01-09-2019, 03:05 AM   #17 (permalink)
ctgottapee
EcoModding Lurker
 
Join Date: Nov 2012
Location: Midwest USA
Posts: 43

the old boat - '93 Cadillac Deville *removed/modified
90 day: 24.2 mpg (US)
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Some trans oil additives could potentially get you similar results, but it would be even more guesswork and potentially risky.

Many are pretty thin
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