posted on Dec, 18 2011 @ 04:33 PM
I'm not a fanatic about checking mileage at every fill-up. But my car has a readout on the dash that gives average mpg and I check it ocassionaly.
Once a week or so. My car is a '09 Corolla and I was getting, on average, 33.2 miles per gallon according to the dash meter. That was when gasoline
was around $3.50 per gallon.
I noticed something over the past few months. Since the price of gasoline has gone down, my mileage started dropping. A few months ago, the price
dropped to around $3.25 per gallon. Shortly after, my mileage started dropping and settled at 32.8 mpg. Recently, gas prices have dropped again to
$3.09. Sure enough, my mileage started dropping again and has settled at 32.2 mpg. My driving habits haven't changed and I do regular maintenance.
This a graphic showing the calculations I did to determine the cost per mile in relation to miles per gallon.
The cost per mile has dropped slightly. However, with the mileage reduction, my savings are nowhere near what they should have been. My car has a 13
gallon tank. According to the price difference, I should be seeing a saving of $5.33 per tankful (WOOHOO! - beer money
). However, with the
reduced mileage, my actual saving is 13 cents per tank. Not even enough for a pack of ramen.
I wondered if anyone else has noticed this. I also wonder if it's possible the oil companies are tweaking the mix to keep their profits up. Granted,
I've been using ethanol blended gas. Maybe I should try the regular gas to see if it makes a difference.
So, what do you think, folks? Am I just imagining things?
edit on 18-12-2011 by N3k9Ni because: had to move my smiley