Hey folks. I recently changed my spark plugs and wires, my oil & filter (duh), and added fuel injector cleaner to my tank. Since doing this, my mileage went from about 25 mpg to 21. It seems like it dipped quite a bit.

Could this have to do with the fuel injector cleaner? Will it go up again?

I gapped my plugs correctly, I know that, but maybe I did something wrong? What advice does anyone have?


Thanks, and good to be here.

Adam

What weight oil did you use?

I used 5W30, the factory recommendation for all seasons.

After refueling, my mileage has increased.