Nope, the trailer has made things lower in the MPG sense, not the L/100 km sense.
Because of the trailer, I use less fuel overall, true (and that's the important fact).
But by omitting some local driving (where I achieve my highest MPG figures), my driving is further biased towards highway use. As a result of the higher proportion of (lower MPG) highway driving, my calculated MPG for a given tank is lower than it would have otherwise been had I just driven the car locally instead of using the bike/trailer.
Ah! I guess I should have read the article before I made myself look like a fool
Not really. I just take it easy - it's all about the gearing
Plus, you don't want to be going too fast with 130 lbs worth of transmissions held on with bungee cords behind you.
If you get one of those bicycle odometers, you can measure how far you drive your bike, then add that into a new car in your garage (total travel/fuel) and see how much gas your saving by using the bicycle! I"m planning on doing this too.