Ok so, cars back to standard and it's still the same.
42mpg on the way to work with little to no traffic driving 70 for a large chunk of the way.
On the way home I thought I'd see if I could get it hot and try to clear anything out that may need burning off so drove home all the way without going higher than 4th and tanking it down some of the roads.. I managed to still get 40mph doing this.. It makes no sense.
Anyone have any further ideas?
How far are you driving ?
I drive 15 miles to work and if i drive at the speed limits i only get mid 40's. If i tickle it i can get low 50's.