anyone want to explain the upstream o2 sensor? is it the one on the air intake?
it should be within 1/2 gallon of erroreven if you do what nofx says. there is still a small amount of error because the pump may click off a bit early or late compared to last time, yes even at the exact same pump. ive actually had some pump click off way before the tank was filled. so thats why its important to repeat this several times and see how your mileage compares over time.
Yes, but sadly most drivers are ignorant of this fact.tire pressure does wonders for fuel economy
No. The fuel gauge is not that accurate.Theres STILL plenty of room for error because like I said, you couldve pumped 10 gallons of gas in there, and had 1 gallon in there to begin with.
Would a better way of measuring your mileage be,
Top off the tank
wait till the needle hits EXACTLY in the middle.
Then measure that? That would be 5.95 gallons remaining in the tank, that is unless there is more then 11.9 gallons in the tank for reserve or something.
I just switched over to synthetic on Thursday. Im going to fill up today and see if my mileage went up. It lowered and I was like "WTF happened?" THen I forgot I was 500 miles overdue.
lol right!! i mean, the name itself tells us the formula... MPG... miles per gallon... miles/gallon... lolLoL. What is so hard in figuring out your MPG? I hope this doesn't require to be stickied.