2003 Honda Civic - accidental diesel in tank

Yeah @VOLVO_V70 I knew that going in. Same goes for many of the replies that I write, But I did it and will continue to do so, just in case they want to take matters into their own hands and be adventurous. I never know when an OP will actually use the advice given, so I pretend that they do and in the process, save the day, as it were. Maybe I add in a ticker tape parade for solving the issue at hand. C’mon man, its what keeps me going, LOL.

It would’ve worked too, oh well, at least they are all fixed up now.

You have a lot of confidence in strangers, here is a story about a guy replacing a headlight bulb and burning the house down;

I think people on here are more interested in the “physical” how. First of all, I’m sorry about your friend’s diagnosis.

As a few people have stated on here, gas and diesel pump nozzles are different sizes, precisely to prevent people from filling their gasoline tanks with diesel. In fact, diesel fuel nozzles are exactly 1/8" larger in diameter; on most cars, due to the filler flap, you cannot physically fit the diesel nozzle into the fuel tank filler neck.

I’m genuinely curious how you accomplished this feat. Did the diesel nozzle fit effortlessly into your fuel filler neck? Or did you really have to force it in there?

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I should have mentioned how, sorry. I’m in Canada…the nozzle went in no problem. The tow truck driver told me they used to be a lot bigger so this never used to happen. Now, apparently they’re the same size. I didn’t know that because it was the first
time I made that mistake.

Thank you, for your kind words about my friend.

Unleaded fuel nozzles are 7/8", diesel fuel nozzles are 15/16". When the nozzle tips are worn they can be forced into the tank opening.

Pump nozzles for refueling commercial trucks are larger for greater volume, 1 1/8".

In the US of A anyway but sounds like that might not be true everywhere in Canada. About as bad now is the nozzle for E15 right next to the E10 and just a little orange or yellow sticker warning you not to use it unless you have a multi-fuel vehicle. I stopped at an out of town chain station Monday and just about did it myself because I wanted mid-grade and it was right in the middle of the regular and premium.