Sudden change in mpg
Just recently moved to TX and have had a sudden change in mpg for my 2024 Audi A3. I was averaging close to 440 to fill and am not barely touching 325. My drive has gotten a bit longer for work but is mainly highway driving. So not sure where the drop could be coming from. I had a change in tire pressure a few weeks ago, but now are all the same.
Car feels a bit laggy (heavy) when trying to shift up near 50mph but nothing that is too excessive. I first criticized the heavier traffic that I experience, but notice my miles till fill still drops heavy after a mile. It’s closer to every mile gets a five mile drop.
I just recently bought an additive (S-Line) thinking that could help clear a few things out but was wondering if anyone thought of something better. I have no check engine lights. I had an oil change at 20k and am not sitting at 21,100 with change appearing around 20.6k.
Help..