NOx purge is but a small percentage of lean burn loss so eliminating it will have little MPG improvement.
For other lean burn discussions see:
http://www.insightcentral.net/forum/vie ... php?t=2945
http://www.insightcentral.net/forum/vie ... php?t=2097
http://www.insightcentral.net/forum/vie ... php?t=2274
http://www.insightcentral.net/forum/vie ... php?t=2581
http://www.insightcentral.net/forum/vie ... php?t=1481
HTH!
For other lean burn discussions see:
http://www.insightcentral.net/forum/vie ... php?t=2945
http://www.insightcentral.net/forum/vie ... php?t=2097
http://www.insightcentral.net/forum/vie ... php?t=2274
http://www.insightcentral.net/forum/vie ... php?t=2581
http://www.insightcentral.net/forum/vie ... php?t=1481
HTH!