New at Hypermiling

[Noname]

I've recently got into hypermiling and ecomodding. I have a 2007 Pontiac G5 2.2L i4 AT w/ 233k miles (374k km) aka The MPG5

Before adjusting anything I was averaging around 27 mpg (US) ~8.7L/100km
At this point I got 32 mpg (7.35L/100km) at my last fill up. I'm currently on track for my next tank to be closer to 35 mpg (6.72L/100km).
My goal is to hit 50 mpg (4.7L/100km).

Currently I've only really messed around with the front end on making it more aerodynamic with grill blocks and sealing gaps.

I'm currently looking into mods for the winter to make my mpg not tank as bad.

Looking at:
- Block Heater
- Lower Viscosity Oil
- Belly Pan
- Radiator Ducting

Any tips to make my car more efficient in the winter would be greatly appreciated!

I want to mod my car in a way that can be easily done and undone for when I sell the car.

I'm looking forward to chatting with you guys on here and getting the best mpg I can.