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Fuel savings

Should Fuel Additives be Added to an Empty Tank?

by Oilem Published on Monday, May 20th, 2013

I am often asked how and when fuel additives should be added. With an empty or full tank of fuel? Should I wait until its down to a quarter of a tank? Etc.

The reality is that it doesn’t matter how much fuel is currently in the tank. The key is to ensure that regardless of the current fuel level, whether nearly empty or three quarters full, when you administer the additive, to fill up on top immediately afterwards.

Doing so will ensure that none of the fuel additive becomes trapped in the filler neck. Filling up on top afterwards will ensure that the entire additive is washed down into the tank. Furthermore, most additives require that they be diluted with a full tank of fuel hence filling up immediately afterwards is necessary for this reason.

Some feel uncomfortable with the inconvenience of using additives at the gas station. For this we suggest filling up with fuel first as well as a 5 litre jerry can. Drive home, put in the additive and then top up with some fuel from the jerry can. If you live very close to the gas station then don’t quite fill the tank to the top; leave a little for the additive and fuel from the jerry can.

Contrary to popular believe, additives do not need to be added prior to filling up with fuel for the purpose of mixing. This is only necessary with fuel storage tanks. Most additives mix instantly anyway and a moving vehicle provides sufficient agitation to complete this process.

If you require any expert advice or help then please don’t hesitate to contact us and either I or a member of my team will be pleased to help.

Related posts:

  1. Using Fuel Additives at Higher Dosages – Overdosing
  2. Are Fuel Additives Safe?
  3. Do Fuel and Oil Additives Really Work?
  4. Fuel & Carbon Cleaners – What Happens to the Carbon?

6 thoughts on “Should Fuel Additives be Added to an Empty Tank?”

  1. Russ says:
    July 16, 2020 at 9:01 pm

    Just wondering if I could use addititive or a mixture of additive and petrol, to clean and treat the inside of a salvaged fuel filler pipe before fixing it to the car?

    Reply
    1. Oilem says:
      July 23, 2020 at 11:01 am

      Use a low cost carb cleaner or similar.

      Reply
  2. Cory Brocken says:
    August 14, 2019 at 1:37 am

    I was wondering if it was coincidence or not. I purchased chevron techron fuel additive and added it to my 2012 Nissan armada, it said 25miles till empty so I’m assuming it had less than 5gals of gas when I added it. Once I added fuel additive, i drove 2 Miles and filled up my tank. The next day my engine was idling rough and check engine light came on which the code said all 4 cylinders on driver side were misfiring. Wondering if this is common or if damage could have occurred driving vehicle with additive and too little fuel. Any experienced input would be greatly appreciated. Thanks in advance!

    Reply
    1. Oilem says:
      August 21, 2019 at 8:58 am

      It should pass but that is 10 times the treat rate through the fuel system for 2 miles and not recommended.

      Reply
  3. Ralph Burton says:
    July 12, 2017 at 4:30 pm

    2.2 litre diesel JaguarXF
    Relatively low milage of 37,000 for car built 2013
    Loss of power momentarily at junctions when trying to pull away at low speeds (intermittent) . Car feels fine at all other times.
    Reading your literature I have identified your product AR6400-D MAX as most likely to be helpful.
    Need reassurance to go ahead.

    Reply
    1. Oilem says:
      July 13, 2017 at 9:01 am

      That would also be my recommendation.

      Reply

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