Thanks Neil,
I have read every post and pondered some, as needed. I have a 2001 Silverado 3500 Crew cab Dually that has gotten 15mpg +- since new. My goal is to get that to 20 mpg, then more. I really appreciate the work and documentation that you have done with your XA. In line with the theory that "every little bit helps", I have a scan gauge, just bought some Gorilla tape, and will cover the grill and front end holes tomorrow, and have Pizza pans for the wheels. Other mods, like the ones you did, will follow. Thank you very much!
Kurt
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