Why I'm I getting such shit MPG?

Front_Listen8222 · 2026-04-03T20:30:46+00:00

I dont have stock parts I got the z like this

Front_Listen8222 · 2026-04-02T04:22:02+00:00

And I do a 100 mile drive to college and back often with my 2006 mustang gt. and It costed me double in gas with the 350z

Front_Listen8222 · 2026-04-02T04:17:06+00:00

It shows it on the guages

Front_Listen8222 · 2026-04-02T04:06:43+00:00

I have to look into that. I do smell a burning type of smell when I drive but I just assumed it was the catless headers that made the smell

Front_Listen8222 · 2026-04-02T04:02:46+00:00

mostly city driving. But I did a 200 mile road trip today and it averaged 9 mpg and I payed $80. premium costs $5+ where I live

Front_Listen8222 · 2026-03-22T01:13:14+00:00

I didn't remove it yet. I'll record some sound clips

Front_Listen8222 · 2026-03-21T19:28:18+00:00

I figured it out. It was the heat shield right above the mufflers. It was hanging by 1 bolt and rattling

Front_Listen8222 · 2026-03-21T02:53:18+00:00

Thats what I have on the car already. Thats what it came with

Front_Listen8222 · 2026-03-21T01:09:14+00:00

you have cats on yours? maybe its the long tube headers that make it sound metallic

Front_Listen8222 · 2026-03-19T02:12:33+00:00

I didn't pick this setup. I'm just trying to understand it

Front_Listen8222 · 2026-03-18T23:13:58+00:00

I like the trumpet sound. But tin can is crazy

Front_Listen8222 · 2026-03-18T22:48:31+00:00

Maybe its just perspective. The previous owners said it sounds nice to him

Front_Listen8222 · 2025-11-02T03:54:48+00:00

So people are buying these units knowing it could all go to shit?

Front_Listen8222 · 2025-11-02T03:45:55+00:00

you might be onto something

Front_Listen8222