My personal experience: The OEM fuel sender has a wire that broke causing the float to jam. This wire is one of the conductors that operate the low fuel warning light. If your light never comes on, then maybe this wire is broken. I hear that many OEM fuel senders have this happen. If you are having problems with yours, then John Hervey is the man to send it to for repair if you don't opt for the TankZilla. With my new TankZilla, the low fuel light tends to start flickering on at around 1/8th of a tank. Several times I have purposely ran my DeLorean out of fuel. For city driving, you have plenty of warning because the fuel sloshes away from the baffle causing the fuel pump to suck air. The car bucks, and you may hear a farting/gurgling noise as the bubbles run through the fuel lines. The last time I ran my car out of fuel, I drove around 30 miles from the time it started bucking to the time where it was sucking enough air that I stopped because I was worried that I might damage the fuel pump running it dry. So I confidently say that these cars give plenty of warning before they totally run dry. But that is for city driving where you have plenty of stops & starts to cause the baffle to momentarily run dry. Highway driving probably wouldn't give you the same warning. Walt Tampa, FL