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Old 04-05-2016, 07:53 PM
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DEF in fuel - dodged a bullet

My DEF was getting low so I decided to go and purchase some at the local auto store. I have filled it a few times and had the dealer do it before (at crazy cost). Previously I have had the boxes this time I got the plastic jug with flexible filler (much better ). However not having used it before I was unsure and concentrating on not spilling any. So I ended up with the filler in the GAS tank but fortunately by the second "glug" I realized what I was doing !!
After checking on line I was scared to death of the consequences. There are some horror stories out there $10,000-20,000 stories. Next day I simulated how much I had put in and was happy to realize it was probably only 2 or 3 ounces.

The fuel tank was full and I had added the cetane booster/additive. First thing Monday I called the dealer but could not get any answer. I had read that we have 2 water filters situated right by the tank, so I decided to drive to work and see what happened. I arrived OK after my 13 mile commute feeling relieved. I had to make another trip during the day but after driving about 5 miles I got the water in fuel warning light. After a minute it went out so I continued, it was back again soon after. I checked the manual, after 5 times stop the vehicle. I turned round and headed for the dealer about 5 miles away, the warning was on number 6 by the time I arived.

They were too busy to look at it yesterday so I got a rental. I picked it up this evening and after changing the water filters, draining the lines and a little fuel from the tank, plus getting and oil change and service, I have it back. $280 all in. It could have been a lot worse, just a few seconds of distraction can cost you a fortune. The good news is if you put a very small amount in the tank it the water filters will catch it.

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Old 04-06-2016, 01:27 AM
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Thanks for sharing your experience. To help prevent future costly mistakes, I would also suggest forcing yourself to stop referring to the diesel fuel tank as a "gas tank".
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Old 04-06-2016, 08:44 AM
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Thanks for sharing your experience. To help prevent future costly mistakes, I would also suggest forcing yourself to stop referring to the diesel fuel tank as a "gas tank".
Concur!
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Old 04-06-2016, 09:16 AM
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Re: DEF in fuel - dodged a bullet

DEF is extremely corrosive. Dealer advice/Common wisdom is for anyone that puts DEF in the fuel tank to NOT START IT, call a tow truck and have it taken to the dealer immediately. The dealer can flush out your fuel tank HOWEVER if you start it and the DEF gets into the fuel SYSTEM, that is when it gets REALLY expensive!
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Old 04-06-2016, 09:58 AM
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DEF is extremely corrosive. Dealer advice/Common wisdom is for anyone that puts DEF in the fuel tank to NOT START IT, call a tow truck and have it taken to the dealer immediately. The dealer can flush out your fuel tank HOWEVER if you start it and the DEF gets into the fuel SYSTEM, that is when it gets REALLY expensive!
I'm just still trying to wrap my head around how it even happens. I've never heard of anyone actually doing this before now. I mean they make them distinctly different colors for a reason
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Old 04-06-2016, 10:21 AM
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Re: DEF in fuel - dodged a bullet

That's why it's a good idea to get one of the fuel inlet caps that are out there. Like DOM's.
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Old 04-06-2016, 09:09 PM
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Re: DEF in fuel - dodged a bullet

I agree it is a stupid mistake BUT the fillers are right next to each other. The DEF jug has no color code and I realized the mistake within a second or two. Google this issue and guys have put 2.5 gallons of the stuff into the fuel tank with catastrophic results. It does happen.
I won't do it again. I would prefer to just get it done with the oil change , but last time I asked the dealer they charged $70 which I thought was ridiculous.
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Old 04-06-2016, 09:59 PM
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Re: DEF in fuel - dodged a bullet

A friend of mine that has fleet of Ford diesel trucks also has diesel fuel storage tank with an electric pump on it. One of his employees filled the DEF tank in a newer Ford truck with diesel. He said the mistake cost him $3,500 to tow the truck to the dealer and get all the diesel flushed out and the truck's DEF system working again. Now he put a larger nozzle on the diesel pump that won't go into the DEF tank. So I guess the mistake can happen both ways. Harder to do this on a Chevrolet truck as they have the DEF tank under the hood. Al
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Old 04-07-2016, 08:52 AM
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Originally Posted by stevekcropper View Post
I agree it is a stupid mistake BUT the fillers are right next to each other. The DEF jug has no color code and I realized the mistake within a second or two. Google this issue and guys have put 2.5 gallons of the stuff into the fuel tank with catastrophic results. It does happen.
I won't do it again. I would prefer to just get it done with the oil change , but last time I asked the dealer they charged $70 which I thought was ridiculous.
If you go to a flying j or loves on major interstates, they have DEF at the pump for like ~$2.50 a gallon
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Old 04-12-2016, 10:03 PM
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Re: DEF in fuel - dodged a bullet

Update....

After picking up the Jeep it has not missed beat, so it looks like there is no lasting issues.
I had ordered new tires off Tire Rack just before my "issue" now I am enjoying the Jeep again with the new rubber. I will post a separate review of these Pirrelli tires.
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