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gas mileage vs catalytic converterrandolf 05-20-2004, 11:28 PM Just wondering if anyone knows the effect of removing my cat on my 96 astro relating to gas mileage. I had it removed a year ago and I'm positive my gas mileage is worse. On this van the O-2 sensor is before the cat, which allowed me to remove it with no ill effects supposedly. vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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