Originally posted by Timmy!
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If you say you get 10mpg since most of you use it to tow and right now diesel is what 3 a gallon? to break even you have to drive 33,333 miles.
That's also not counting all the other filters you have to buy, and assuming you don't break anything in your engine. So again it's great idea, and if the oil you have access to is free and you can always get it, then it's sweet set up, go for it. but for most of us, unless you have money just laying around and like the idea it's not practical.
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