You might want to calculate mpg before you claim you are getting poor mpg.17 gallons is the tank capacity
Dozens if not hundreds of threads explaining how to calculate mpg:I’ve been a lurker here for some time now.
1) Fill tank until the pump clicks.
2) Drive 200 miles
3) Go back to same station, same pump. Fill until the pump clicks.
4) Divide the miles you ACTUALLY drove by the number of gallons of gas you ACTUALLY needed to fill up again. THAT is your mpg.
Yes, it is the gas. Time and time again, in just about every thread about "poor mpg", it is stated that winter blend fuel will yield fewer mpg than will summer blend fuel. Yes, each contains ethanol.We get ethanol mix gas here year round so its not the gas. Also i try to stick with shell, exxon/mobil, or bp regular. Once in a while I’ll use the premium.
Regardless, those spark plugs look "rich". Were the remanufactured fuel injectors all within 4% flow of one another and with proper spray pattern?
I screwed up in another car once- I bought remanufactured fuel injectors that were not in sync- as a matter of fact one was literally dumping fuel. Killed my mpg, killed my catalytic converter, and never threw a code.