Just sharing a small update I made to my car a few weeks back...... I upgraded the spark plugs (Denso iridium SK16R11 - from Advanced auto parts $9) and also the tehcron fuel cleaner that was on sale asking $4.
After I waited two weeks for two tanks of gas and ran 5 trips each around 18-20 miles whilst driving under normal conditions. I was actually amazed by the results on my OBD ap and the figures. For an old 2007 base Vibe I was actually happy at even the previous gas mileage but shocked after the small upgrades or maintenance.
Before the same trips would give me 28-29 mpg (with the best been 29.1 mpg) and now after new plugs and after two tanks of techron fuel cleaner the figures were 31.36-35.38 mpg.
I will post some pictures and numbers don't lie...... At first I thought the tiny acceleration boosts were placebo getting me, but then I ran the numbers and they were all higher and especially concerning fuel economy!
Stay safe and peace <<<<