here's one i didn't see on the 65+list: set wheel alignment to factory (or zero/ straight ahead).
my honda had wheel alignment way out of spec when i bought it (3 yrs old, used car). re-set to factory alignment improved economy.
i would expect going to a zero toe set up might improve economy even more.
Also, what about re-mapping? Is that on the list? My honda get better mpg with an aftermarket engine map.
I'm also going to look at the potential for some economy gains in re-designing factory exhaust systems - maybe removing some of the restrictions there might give me some gain for not much $£.
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