Thread: Do you top off?
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Old 03-02-2014, 03:47 AM   #12
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There's a chance you may put fuel into the charcoal canister among other things in the EVAP system when you do this. I've seen it a couple times. That's typically why they advise against doing it. When you fill up, vapor forms in the tank. That extra space you're filling with fluid is also there to give the the fuel vapors space to expand.

I know some people will still say they do this all the time with no problems. However this is how I've been trained from the manufacturers I've worked for in the past so I'm simply just passing on the information.
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