That is interesting, one of the things that they impressed upon us in the New Car Product class when the 850 came out ('93) was the dead nuts accuracy of their trip meters. Of course all of the instructors and reps were driving them at the time and they atested to the fact that they had thoroughly tried them out and that in fact they were pretty much down to a nat's ass. Now the check engine light, if the car is late enough and it is running OBDII software it will in fact shut that light off but we are talking a loooooong time. OBDII software dictates that two complete drive cycles with out the problem reoccuring will cause the light to go out and leave the code in the computer as a pending code for something like the next 40 cycles or so. It has been my experience that it can take a loooong time to get that light to go out by itself. If you ran it out of gas then I have no doubt that you have some missfire codes, among other things, in there.