Finally, I matched the all-time-best I had with the old '06 Jetta TDI with "Silver", my newer trusty steed! I've been very predictably maintaining 38.6-39.2 MPG with the less efficient higher traffic commutes when I deliver the kids to school. Now that they are on summer break I reverted back to leaving earlier and have much more room to engine on coast and DFCO. I also removed the bottom portion of the grill blocks to reduce cooling fan usage. I've also been able to see trends with the scangauge that's helping me conserve more fuel. Normally, I try to only use the AC when I'm coasting and DFCO but I've been using it at stop lights too. I've been loosing .1 mpg every 2-3 seconds with AC so I've tried to endure the heat and not use it until I get to a better MPG situation to cool down.
On our family trip to the outer banks running max sidewall in the CX-9 I hand calculated over 25 MPG over the whole trip on E10. That was with maximizing my speed and using the AC very liberally. I didn't think that was too bad using a 3.7 liter with a six speed auto
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There are more pics on the Silver build thread. I still have the upper grill block with the ambient air sensor snorkel attached. I'll put the lower one back on when it gets back below the 80s again. I doubled the air hole access and was still smelling hot plastic. I got worried that the headers might not be getting enough air moving around them causing the plastic belly pans and tunnel to suffer too much. Also, since I'm using the AC often I want to be able have enough fresh cool air moving across the condensor to pulse the inside air temp down in preperation for my next hill climb or stop light.
