MPG

[crackerjack1957]

Same tires , same pressure . "New to Me" was December '25 .

Single digits temps will definitely affect mileage.......unless you added air to tires a 20° drop will also change pressure

 

[PowersOf12]

My Hemi dropped off from (brand new in 2012) of 23.5 mpg all highway (in MDS mode) until last week of 20.75 mpg all highway (in MDS mode). I put a bottle of Techron cleaner in it about every 6 months and now use a bottle of Moly on every oil change as I am near 190,000 miles.