# Gas in diesel

**URL:** <https://community.cartalk.com/t/gas-in-diesel/3101>\
**Category:** Maintenance/Repairs\
**Created:** [August 14, 2007, 4:46pm UTC](https://community.cartalk.com/t/gas-in-diesel/3101 "2007-08-14T16:46:05Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![gerry\_nolan](https://avatars.discourse-cdn.com/v4/letter/g/4491bb/32.png) [@gerry\_nolan](https://community.cartalk.com/u/gerry_nolan)\
**Post date:** [August 14, 2007, 4:46pm UTC](https://community.cartalk.com/t/gas-in-diesel/3101/1 "2007-08-14T16:46:05Z")

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have a 2000Ford F350 diesel and mistakenly put 3 to 5 gallons of gas in it then filled it with diesel fuel some one said to add 2 qts of automatic tans fluid and it would help or should I drain the tank

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [August 14, 2007, 5:03pm UTC](https://community.cartalk.com/t/gas-in-diesel/3101/2 "2007-08-14T17:03:48Z")

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2-3 gallons of gas in how much diesel?

Assuming a large tank and assuming the rest of the tank is now full of diesel, you should be OK. In the old days we added a gallon during the winter to prevent clouding.

There is a possibility that some of the fuel system may not be able to stand up to gasoline, but I suspect your truck will be OK. A potential big problem is damage to a pump or injector due to too little lubrication. That is what the suggestion for the oil was all about. I doubt if it (the suggested oil) would hurt other than a possible bit of smoke.

However 2-3 gallons in a almost empty tank, that would be bad to drive with.

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**Author:** ![gerry\_nolan](https://avatars.discourse-cdn.com/v4/letter/g/4491bb/32.png) [@gerry\_nolan](https://community.cartalk.com/u/gerry_nolan)\
**Post date:** [August 14, 2007, 5:31pm UTC](https://community.cartalk.com/t/gas-in-diesel/3101/3 "2007-08-14T17:31:29Z")

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a 28 gallon tank

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**Author:** ![Craig58](https://avatars.discourse-cdn.com/v4/letter/c/3da27b/32.png) [@Craig58](https://community.cartalk.com/u/Craig58)\
**Post date:** [August 14, 2007, 5:51pm UTC](https://community.cartalk.com/t/gas-in-diesel/3101/4 "2007-08-14T17:51:46Z")

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If you only have 2-3 gallons of gas mixed with diesel in a full 28 gallon tank, I think you will be OK. I would probably refill it with diesel when it gets half empty, or so, just to dilute it some more.

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**Author:** ![gerry\_nolan](https://avatars.discourse-cdn.com/v4/letter/g/4491bb/32.png) [@gerry\_nolan](https://community.cartalk.com/u/gerry_nolan)\
**Post date:** [August 15, 2007, 12:17am UTC](https://community.cartalk.com/t/gas-in-diesel/3101/5 "2007-08-15T00:17:04Z")

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so the advice is I don’t need to drain the tank?  
are you sure

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**Author:** ![Craig58](https://avatars.discourse-cdn.com/v4/letter/c/3da27b/32.png) [@Craig58](https://community.cartalk.com/u/Craig58)\
**Post date:** [August 15, 2007, 12:33am UTC](https://community.cartalk.com/t/gas-in-diesel/3101/6 "2007-08-15T00:33:23Z")

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That is what I would do. I once accidently put about a gallon of gasoline in my 21 gallon diesel tank without any noticeable effect. If you really want to be sure for your engine, give your ford dealer service department a call and see what they say. I suspect it will not be the first time they’ve been asked that question.