He was giving a sales pitch with the intent to make a sale, not necessarily provide accurate information about realistic gains. I'd be willing to bet they never actually put a 210.025 on a dyno to measure the actual change, or at best they took info provided by an early customer and used that info.

I went through this discussion with a different chip maker (or two) years ago when they were claiming steep power gains on a 500E. I eventually got a guy who admitted their charts are based on "average gains for that type of motor" and that it was not accurate for the 500E specifically. I was shocked at the honesty, but also don't think they removed their listing/info for the 500E chip (can't remember - they may have).



I'd expect a tap dance about how you are using the power more and that is affecting the MPG numbers, varying fuel quality, AC usage in summer, winter blend fuel with lower BTU, etc, etc. Hope I'm wrong. It will be interesting to see what they response is after you have more data to share.