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I changed the spark plug, spark plug wires, disturber cap and rotor, air filter, and a oil change to 10w-30 royal purple and for some odd reason the top half of my tank of gas goes down really really really fast, like unbelievingly fast. I filled up on Wednesday and its Friday and I'm almost down to half with only 60 miles traveled. The funny part is the bottom half of my tank is fine I averaged out to about 160 miles mixed driving. I do have a bad EGR, does it really throw off a tank of gas like that?
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