Can you get fuel sensors to detect the right kind of fuel for a car?



I know someone who has filled up his diesel car with petrol twice, and
I think it would be a good idea to put a sensor in the tank that would
stop him driving off and wrecking his engine. There may be an
after-market market for this.

The least it should do is sound a warning alarm. Are there cars with
this already?

There may be safety considerations to stop the sensor working when it
the car is being filled, since the car is meant to have ignition off
when filling up.

Converting pump nozzles to be smart pump nozzles is one idea, but it
would need standardization to be effective, and by the time all the
petrol stations had converted, they would probably be selling hydrogen,
biodiesel or LPG anyway.

.



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