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Old 11-21-2014, 08:06 PM   #1
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DEF question

What's general opinion on buying older rv to avoid DEF vs newer? Have heard that having an rv requiring DEF is worth it if flat towing since exhaust is much cleaner and keeps towed vehicle much cleaner. In the big picture is DEF really an issue? Thanks again - Arnie
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Old 11-21-2014, 08:08 PM   #2
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Other than cost there has been few issues. But if your plans ever consider Mexico, get an older pre emission truck
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Old 11-21-2014, 08:18 PM   #3
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I'm pre-DEF (07) my Jeep Toad doesn't seem to suffer
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Old 11-22-2014, 07:07 AM   #4
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DEF is under $3/gal at the pump. I have about 15,000 miles on our new coach and you can stick your fingers in the exhaust and they come out clean... cleaner that a gas car exhaust. I have no issues with it, the expense is minimal as you use about 1 gal DEF to 50+ gal diesel
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Old 11-22-2014, 08:00 AM   #5
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DEF is widely available. I bought a 2.5 galling container at Walmart. Many auto supply stores will also have it available.
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Old 11-22-2014, 08:25 AM   #6
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The only real pain with DEF is where they put the fill. Tucked up inside a compartment. When it should be just like the fuel fill. It they would put its fill cap in its own door on the outside of the coach, I'd be happy.


Even our Jeep Grand Cherokee has the DEF fill in the fuel fill door, it's not rocket science.


But on our big elaborate motor home to get a comfortable fill position requires you to drive through truck stop pumps backwards or a 2 foot spout on the jug.


We use 2 1/2 gallons every 1,000 miles, our coach has 25,000 miles on it. Tailpipe looks brand new on the inside.
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Old 11-22-2014, 08:39 AM   #7
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Did DEF start in 08 or 09?
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Old 11-22-2014, 08:44 AM   #8
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Usually buy diesel and DEF at Pilot/Flying J using the truck island - we get a 9 cent per gallon discount on fuel through CW and the Pilot Card, which lets me pump a full tank without a transaction limit like a lot of credit cards. Happy camper (pun intended).


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Old 11-22-2014, 08:55 AM   #9
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Hi niceguy9605,
DEF depends on the year of the engine not the coach. Engines made starting in 2010 need DEF. Chassis builders stocked up on pre-DEF engines. This means one could have a 2010 or even a 2011 coach and still be pre-DEF. One could have a 2010 coach requiring DEF.
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Old 11-22-2014, 01:15 PM   #10
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Hi niceguy9605,
DEF depends on the year of the engine not the coach. Engines made starting in 2010 need DEF. Chassis builders stocked up on pre-DEF engines. This means one could have a 2010 or even a 2011 coach and still be pre-DEF. One could have a 2010 coach requiring DEF.
Until recently, we had a 2010 Fleetwood Discovery which didn't have DEF. New coach is definitely cleaner situation and DEF is easy to find. The fill isn't a problem unless you're on a long trip and want to keep it full as possible and need to plan that in to every other stop or so. NOT a deal breaker for us.
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Old 11-22-2014, 01:27 PM   #11
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We use DEF & in our Winnebago it is easy access on the drivers side in the rear compartment. I do not necessarily keep it full. There is a shelf life on DEF. I have been told 18 months & 24 months. We hold 10 gals & go through about 1 gal every 50 gals of diesel fuel. Sometimes we drive enough to use a tank in a year & sometimes not so I keep it at a point where I believe I will use most of it in my near future trips.
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Old 11-22-2014, 01:28 PM   #12
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I'm pre-DEF (07) my Jeep Toad doesn't seem to suffer
Don't see any soot on mine either.
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Old 11-22-2014, 02:50 PM   #13
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Until recently, we had a 2010 Fleetwood Discovery which didn't have DEF. New coach is definitely cleaner situation and DEF is easy to find. The fill isn't a problem unless you're on a long trip and want to keep it full as possible and need to plan that in to every other stop or so. NOT a deal breaker for us.
X-2. Just carry spare 2.5 gallons. Never an issue.
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Old 11-22-2014, 04:54 PM   #14
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Winne put the DEF fill on the passenger side. All DEF fills so far have been on the driver side at truck fill areas. The DEF at the pump is a whole lot cheaper than buying off the shelf. So far, I have been able to drive thru the wrong way to fill, that can get dicey. We hold 15 gal. of DEF, or so. Carrying a 2 1/2 gal. refill doesn't really fix the problem. Anyone out there have a solution?
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