It's my wife's car, technically. Now that the Electric Booger is basically finished, I think it is time to redirect my efforts to the Matrix.
2007 Toyota Matrix XR-B.
Automatic. I tried to teach my wife to drive stick with a previous car (Toyota Echo) but just thinking about what the clutch endured makes me shudder. Actually...there was some actual clutch shuddering going on too...
Right now it is averaging right around EPA mpg. My super duper hypermiling attempts are thwarted by my wife's driving. She refuses to do anything "out of the ordinary" to increase economy.
My goal is an increase in economy of 15%. This with a normal looking car without extraordinary driving techniques.
It will be interesting to see results of various modifications, as there shouldn't be skewed results from changes in driving style. I will simply do modifications (hopefully with A-B-A testing for my own satisfaction) and see what the fuel mileage graph does with my wife in control.
I will edit this list with links as they occur.
1. Toyota Matrix Defrost Mod
2. Mud Flap Delete.
3. Tire pressure increased to 45 psi (40 psi with my winter tires).
That's it so far....
I ordered a block heater kit today from my local parts store. $35.49, which thought was quite reasonable.
1. Lower Grille Block.
2. Belly Pans - under engine and under rear of car - very dirty aero spots on this car.
3. Rim Aero - I am still dreaming up ways to do this without a full pizza pan cover. I doubt my wife would agree to that. I am thinking of "behind the alloy spoke" inserts to keep air from getting through the rim to the inside.
4. HAI - I will start with some ducting. If that works, I may use engine coolant for heating like t vago: Recovering lost heat energy in engine coolant...
5. EGR Addition - expanding on Daox's idea: Increasing EGR flow for better mileage
The Matrix does not have an EGR valve but I would like to experiment with the effects of pulling exhaust from the tail pipe through an intake vacuum port.
6. LRR tires.
7. Switchable alternator with ON/OFF switch. Experiment with a deep cycle battery and charger. Eventually go with a 48V lithium pack (electric bicycle?) and DC-DC converter. Can you say "super ultra mild hybrid"?
Suggestions are more than welcome.