06-13-13, 02:30 PM
My CTS 3.0 has the factory 17s, and I wanted to go up to black 20s. I know it may be a bit slower if the wheels are heavier, but have people noticed a drop in MPG by going to a 20" wheel? If so, I may stick with 18s depending on the drop...
06-13-13, 02:35 PM
Everything changes...ride, braking, and mileage. Just do it
06-13-13, 02:39 PM
How much MPG we talking though? One of the main reasons I got the cts was better mpg over my ram, so dont want to be going too far in the opposite direction with mpg
06-13-13, 08:08 PM
Heavier wheels will probably reduce it, but what mpg are you getting now?
06-14-13, 04:24 AM
I have 22" wheels on my CTS. They came on the car as well as the stock set and I have yet to put the stock wheels on so I can't really compare, but i did make a 4 hour drive on the high way and average 23 mpgs. You can definitely feel every bump but it is worth it in my opinion.
06-14-13, 10:26 AM
I get 18-20 on my 12 sedan with the factory 19s and awd