RE: 5.7L break-in...MDS active?
I have about 1000 miles and have seen 16-18MPG as I have been breaking it in. 0-130 0-80 0-95 and my sister-in-law blew her load at about 115 when she has no need for my brother anymore just wants to get one of these. Did an over the road trip and got 23mpg I am sure that she dropped to 4 on the road when we were cruising at 72. I am also sure that she went into gas guzzeling mode when I got pissed at idiots on the road. Never seen "Gas Savings Mode"