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Old 04-04-2010, 01:13 PM
Penguin Penguin is offline
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Location: Illinois
Join Date: Aug 2003
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Mein Auto: Z4 and X5 Diesel
Originally Posted by ard View Post
$16 a gallon, about 1000 miles per gallon,.... So add 1.5 cents per mile. (My original fill of 6.5 gallons has lasted 9000 miles so far, and no warnings yet...)... The fluid is sold at virtually every truck stop across america, and is used every day by long haul truckers. Nothing esoteric or expensive about it...



Yes, and I have seen projections that indicate the price of DEF will fall to below $5 a gallon once its use in over the road semis becomes widespread in the next few years.

Here's one source of that projection:

Of course, if one insists on buying it from BMW, you can multiply that price several fold.

Here the Cummins DEF:

Last edited by Penguin; 04-04-2010 at 01:18 PM.
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