So my on my fifth fill-up and I picked up 1.8mpg going from 5w-20 to 5w-40 in my 14 JK. I've run PUP 5w-20 and PP Euro 5w-40 since. I know this isn't a scientific long term experiment but I honestly thought it was going to go down at least a mpg.
![1000007586.jpg]( "1000007586.jpg")
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