I had a wiring problem for about 6 months that caused my glow plugs to be inop and had to use starting fluid on it twice a day and it runs as good as it ever did. We use starting fluid on trucks at work. I know its not exactly good for a car but its not as bad as people make it out to be. Manual says 30 percent gasoline, I don't know if I wanna go that high. I just wish it would warm up.