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Accidentally put 87 fuel in my A4...

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Accidentally put 87 fuel in my A4...

Old 09-01-2014, 05:57 PM
jholes752's Avatar
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Join Date: Sep 2014
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Default Accidentally put 87 fuel in my A4...

So I own a 2002 Audi A4 3.0 and I was refueling today, but I wasn't really paying attention to what I was doing and put 87 fuel into my car, which recommends 91-95. Now I looked around a bit and I can't really get a definitive answer as to whether or not this will damage my engine, as people are saying the "knock sensor" should detect the different timing and retard the engine and you should be relatively okay for the tankful as long as you don't push it, and others are saying there is a good chance it damage the pistons and cylinders. Can someone please explain if I should be okay for the tank? Any help is appreciated.
Old 09-01-2014, 07:21 PM
bradtyler02's Avatar
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Join Date: Aug 2009
Location: Fort Irwin, CA
Posts: 5,312

Once time shouldn't be a big deal... don't stress it.
Old 09-03-2014, 03:48 PM
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Join Date: Feb 2009
Posts: 17

You're fine. The ECM will adjust ignition timing to prevent any damage. As Bradtyler mentioned, just don't push it until you fill up again.
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