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I deleted a bit more of your response but I'm looking for long term MPG goals. My current employer is 30 miles away. I was just hired for a job job that will require a lot more travel with less fuel reimbursement. So I'm definitely looking for better MPG.
Personally I run about 45 psi in my tires. Near the max pressure but not over it. I also run higher pressure in the front than the rear because I want more neutral handling.
I'm presently playing with my tire pressure and adjusting it in 2psi incriminate. I believe the mismatch tires on the car (lion heart and fuzion) is causing a marginal decrease in mpg.
One easy thing you could do is get rid of your spare tire, jack, and tire change kit. The Spark EV did not have one and just had a factory air pump with tire sealant. You could buy a can of fix-a-flat and save about 30 lbs of weight. That depends on your risk tolerance. My 2017 Bolt didn't come with a spare tire and I bought a Spark spare from a junkyard because I've had enough flat tires to always want a spare with me.
My 2014 didn't come with a spare just the repair kit.
You could also remove the rear center seatbelt if you don't need it for small kids or car seats.
I unfortunately need to keep the safety gear due to having children .
Another easy thing is a grill block. Most of your center grill is blocked off already but you could use tape, cardboard, or some custom made plastic panels to block off more of the grill. It is likely way oversized for use in Northern Wisconsin and is sized to flow enough air to keep the car from overheating going up steep passes in death valley at 120F outside temp. Just keep an eye on your temperatures (I blocked about 30% of my grill in a 2003 VW TDI and 2004 Prius while living in Alabama with no issue)
Are you referring to blocking infront or behind the grill?
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