Welcome!
Your CR-Z is just breaking in, so it should get better over time anyway.
Lowering definitely helps reducing air resistance. Getting accustomed with the hybrid system does too, you might need to. I tried to drive economically from day 1, yet it took me almost 10000 kilometers before that became apparent (see my log).
You need 5 posts before you can add links and pics, but just drop in the URLs and a mod will put them up for you.
Read the 100+ hypermiling tips and 65+ mods. Get addicted
__________________
2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.