Hello Scotty,

I currently have a 2013 EX Honda Insight with 154,575 miles on it (bought brand new in 2013). Since my car hit 144,000 miles, my avg gas mileage went from 43-48 mpg to 33-37 mpg (summer) and 37-40 mpg months to 28-33 mpg (winter). Over a year now I have been dealing with this.

Here's a history, due synthetic oil changes of mobile one and pensoil (the entire time, more pensoil over last year). I use regular 87 grade gas. Did 5 transmission fluid drains over the life (transmission works great). I always use gum out or Lucas fuel cleaner annually/ recently had my dealer cleaner my fuel system flush and fuel sprays cleaned. Bought new low roll tires (all four). Brakes were changed at 92,000 miles with rotors (still had some life on em). Engine and cabin filters changed once a year. Newer car battery. Also I bought a new hybrid built battery from greentech for 2k (not refurbished, it's brand new) and swapped it out with my old one a couple months back (no IMA lights went off/ I changed it to see if my fuel economy would improve...It did not!). And I forgot to mention at 103,000 miles, my 2013 insight had oil burn 1 quart every 1k miles issues (know by honda and fixed for free under a settlement warranty to gave out), so honda fixed my Engine (4k job) and put new pistons/rings/spark plugs/ gaskets/ clips and tuned up the engine. Honestly the car had no issues with the engine since they fixed it at 103k miles. 

I have done a lot to this car over the years and want to make it work. I recently been to three different shops after I had gas mileage issues and got my IMA battery installed. I asked them to check fuel system,spark plugs, Catalytic converter, O2 sensors, exhaust and nobody can figure it out. The new IMA is not the issue or the old one. This has been a pain in the butt figure out but I though I would bring the impossible to you Scotty hahaha; if you can't figure it out, then no one can!

Look forward to your insight; no pun intended! 

1. Sam Meyers,