Yup, soon.
Discovered another fuel economy sapping problem and did my first 2 ecomods today.
Problem was I noticed the temp gauge wasn't coming up very high, and seemed to drop on the highway. I wondered if the thermostat was stuck open, so I popped the rad cap off and did a cold start - sure enough, coolant was flowing vigorously through the rad when it shouldn't have been.
We already know that a cold engine doesn't get good fuel economy due to fuel enrichment (and boosted idle speed):
from
Mini-experiment: cold start fuel consumption and warm-up time - MetroMPG.com
So ... vert
ecomod #1: replaced the stuck open 88C / 190F t-stat with a 90C / 195F t-stat. Temp gauge is now sitting smack in the middle of the dial where I'd expect it to be.
And
ecomod #2: changed the oil to 0w20 synth from whatever was in it (which was black, black).
Also removed a nail from a tire and inserted a plug with a $10 pair of tools and patch kit. That was super easy to do, especially after watching a guy do it on YouTube.