[mpg_numbers_guy]

If you've disabled cylinder deactivation then you're stuck with the thirsty V8. Does it have an EV mode button? If so then your best bet is probably P&G - drive a bit with the V8 on charging your battery, then EV mode for a bit, rinse and repeat. No way is that huge vehicle going to be able to hit 40 mpg unless it gets the full basjoos treatment, has a smaller engine, or a planetary gearbox like the Prius.

I have many words to say about people who buy an oversized vehicle because they think it keeps them safer....but I'll spare you.