looking for tune recommendations for 2019 Elantra to improve gas mileage

[ElantraXpress]

Man, my commute is a total slog, so I snagged a '19 Elantra,pretty much just for the gas mileage. Trying to milk every drop, you know? Anyway, has anyone got tips on tuning or cheap mods to squeeze out a bit more mpg? I saw that TDI thingy promising a 20% bump (plug-in box, $334,ouch), but honestly, that price feels kinda spicy, and I'm not exactly sold on the hype. Maybe someone's got a cheaper hack or actually reputable mod?

 

[elantra_guy_12]

I understand the frustration but I think it's better to focus on the basics first.
Making sure your tires are properly inflated can make a surprising difference!
Also, avoid hard acceleration and braking, and instead go for a smoother drive.
Anticipating stops and coasting can save fuel too!
Then of course, keep up with your regular maintenance like air filter and oil changes!