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Ok for the people who say emmissions... really? It takes 150 miles MAX for the car to cycle itself. If it wasnt on before with no cats why would it come on now??? That means that his car has his REAR O2 sensor turned off already...
 
You should be able to see a lot more than 200 a tank.
That's about what I see in my Cobra. And about 220 on my GT. And yes, I've done typical maintenance stuff to it, etc. And I have a very light foot...so :dunno

I just wasn't expecting great gas mileage w/ my cars and I thought it was normal until I saw other people getting like 240/50 a/gal.
 
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