So the 1st few hundred miles are rolling in at 37-38ish, with 'normal' driving.

For context vs the HAH- I get 37-39ish on a tank now. After 20k miles. Driving relatively gently but without the 'true' hypermiler techniques. And I have the highest still-contributing average in the HAH db.

Winner (no surprises here): TCH. You're matching me without even trying, on a virgin engine.