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Congrats and welcome!
I’ve read and re-read this statement, not understanding at all...please clarify.For cruze diesel, looks like we need to subtract about "2" from every reported mpg, in order to account for the mpg of the DEF. Otherwise it is not a fair comparison against the gassers, if we omit the DEF fuel that is very required in the diesel!
Please explain how DEF gives diesels a miles per gallon advantage over gas engines.Thanks folks for confirming my rough calculations that including DEF in mpg or dollars per mile arithmetic reduces the result by a percent or a few percent. So we should always reduce the calculated diesel mpg by an entire mpg or two to account for the DEF consumption in our cars. We can define a new ratio relating diesel consumption with DEF consumption as the DEF-consumption-constant - it might be different for each vehicle/engine/driving-condition, and it seems to be between 1% and 5% range.
We'll need a name and a Greek letter for this new constant.
DEF needs to be refilled and it gets burned up in order to make the car go more than 4 mph.
Please tell me again why DEF is not fuel and/or pony up and refill my cars DEF whenever it needs it? It's really a minor cost, not a big deal, it shouldn't be a problem for the hordes of DEF-is-not-a-fuel people to refill it on my car when necessary, you can each take a day of the week to check/refill my cars DEF as necessary. Thanks in advance !
Alrighty then.Rivergoer, to answer your question about "how DEF gives diesel an mpg advantage over gas engines" . Your question contains an implicit falsehood so there can be no answer.
In fact, the mpg advantage of diesel pre-existed DEF.
But today, DEF gives new diesels a chance to exist legally on USA roads, and thus to demonstrate their improved mpg over gasoline equivalents. Without DEF & related technology there are no new diesels on USA roads.