So real quick I just bought a Brand new 2018. It came from the dealership with 100 miles on it, i test drove it 5 times at the dealership and put 160 extra miles It before I bought which I finally realized I was getting a stealing walking it out the door for 55k.

Long story short in test drives and the week or 2 after it was running 0-60 in 4.4 to 4.5 constantly. I live in vegas and the temperature was around 40 to 50 degrees. Now after having it for 2 months and it's at 1900 miles so it's pretty broken In The 0 - 60 is around 4.7 to 4.9 on the same gas and temperature is around 60 degrees and I also do it late at night when its colder. So this weekend I decided to try a few gallons of 100 octane fuel to see what it did and in sport mode I hit a 4.6.

Has anyone else noticed a loss like this before? Did I **** it up breaking it In? Should I do a fluid change out or anything like that?

It feels slower now then it did when i first bought it and with only putting 1700 miles on it i dont believe that type of drastic change would have happend so soon.

 

I'll guarantee FCA never tested or calibrated it using 100 octane gas . Use what was recommened , 89 I believe for the hemi .

 

What method are you using to measure the 0-60 time? Are you at a track or using a cel-phone app?

-Rod