Since this is more of a fact gathering thread, I will say that I have use Lucas Oil fuel system treatment with success. My Intrepid was beginning to take longer to start than normal and I deduced that it must be from not building fuel pressure fast enough.
Within 50 miles of adding it to the tank fuel pressure was back to normal and it would fire on the 2nd revolution reliably again without hilding the key on before starting.
Additional lubricants in the fuel, especially for cars with higher mileage, is helpful.
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