Smashed Ixnay
Veteran Member
When I first got my car (34k miles 2015 Passat TDI SEL) at 70mph it'd get 49mpg hand calculated without trying. I want to say around 70k miles it started to go downhill. I had a ton of emission warranty work (new dpf, new hpfp) and it went back up to normal. Around 120k it started to go down again and I want to say around 70mph the max I'd get is around 45mpg. At 140k miles I went with Malone stage 2 dpf tune and it was about the same, maybe a tad bit worse. At 170k miles I lost all emissions and mpg's stayed exactly the same (Malone stage 2 offroad tune). At 190k miles turbo blew and I went with an Xman GTD1456vz turbo. MPG's are pretty much the same.
I will say my suspension absolutely sucks. I replace shocks and struts, but never did the springs. I need to replace those, along with a few other parts. I know when I back up and turn I hear a popping noise, so maybe ball joints? Either way I heard my suspension wouldn't make my mpg's drop that much, if any at all. I know the bigger turbo won't help my mpg's, but my mpg has been pretty consistent since 120k miles (225k now). I'm just wondering what would make my mpg's drop. I've pretty much used the same times and not comparing winter fuel to summer fuel. I know that affects it, but that's not my issue. I used to regularly see 700 mile tanks, but now I'm lucky to get 600. I did see 800 mile tanks a few times without really tryin, but I'll never see those again, much less try for 900 again (912 my record around 60k miles).
I will say my suspension absolutely sucks. I replace shocks and struts, but never did the springs. I need to replace those, along with a few other parts. I know when I back up and turn I hear a popping noise, so maybe ball joints? Either way I heard my suspension wouldn't make my mpg's drop that much, if any at all. I know the bigger turbo won't help my mpg's, but my mpg has been pretty consistent since 120k miles (225k now). I'm just wondering what would make my mpg's drop. I've pretty much used the same times and not comparing winter fuel to summer fuel. I know that affects it, but that's not my issue. I used to regularly see 700 mile tanks, but now I'm lucky to get 600. I did see 800 mile tanks a few times without really tryin, but I'll never see those again, much less try for 900 again (912 my record around 60k miles).
I honestly just want to change the whole front end suspension at this point. Anyone know of a place that sells a whole front end suspension kit? I'd also just change the front wheel hub assembly while at it. As much as I want a new car (2016 Audi A6/A7), putting $1k or so and doing all the work is much cheaper than payments again. I'd assume I'd need sway bars, control arms, front wheel hub assembly, new springs, brakes/rotors, ball joints, etc. Anything else major I'm missing atm?