Originally Posted By: MrHorspwer
Originally Posted By: Cujet
The actual cost of DEF may add between 17 and 20 cents per gallon. Depending on the vehicle and how it is operated. Not to mention the additional maintenance costs, which are substantial over time. As the systems do break down.
Put another way, a DEF equipped vehicle's owner should add 17 cents to each gallon of diesel to calculate direct operational costs.
And where is your math coming from?
Here is Edmund's math:
6 gallons of DEF on their Ram EcoDiesel lasted 6,858 miles. Average MPG for the truck (under mixed use, including towing) is 22.1 MPG. That averages out to 310 gallons of diesel for every 6 gallons of DEF.
Assuming DEF costs of $3.15/gallon (current price for SuperTech DEF at Wal Mart... it can be had even cheaper at larger truck stops), it costs $18.90 to top up the DEF tank.
$18.90 divided by 310 gallons of diesel adds about 6 cents of DEF to each gallon of diesel.
Unless you're mixing DEF with Chanel No. 5 or your vehicle is consuming DEF at the rate of Bud Light at a frat party, 17 cents a gallon is a little high. Not really... it's ridiculously high.
http://www.edmunds.com/ram/1500/2014/long-term-road-test/2014-ram-1500-ecodiesel-def-jam-iv.html
I see where the Walmart SuperTech is Ansi certified but there is nothing on the label saying it's ISO 22241. Is it still OK to use in a 2013 Chevy Duramax?