[Blackwolf666]

Hi everyone. I've been getting to find a quick way to help me with my mpg on my 2013 ss and I found out about Ute fuse plugs that reset the fuel map so it performs better on high octane gas. Anyways I did that and I saw my mpg rise from 14 to 19 and I was happy to see that. But now that i filled up the tank again (with hi octane) i saw that it started to go back down to 13-14 mpg. I did the same amount of driving around city and highway. My car has 21k mi auto trans. I'm gonna pull fuses again to see if it changes but is there any ideas as to why it's good on gas to horrible when im not pushing the car hard at all


Thanks