My car weighs 4013lbs (with me in it) and averages 17mpg on my 21.7m (roundtrip) commute.
My gas tank holds 20 gallons, but I only ever fill it up half-full. The reason I do this, is because my brain knows how heavy 4 x 2.5 gallon containers of water
is, and thinks that not carrying this additional approx 60lbs of weight (1.5% of the 4013lbs) will be better for both mpg and performance (i.e. less liquid sloshing around the tank). Is my brain crazy?
posted by forallmankind
on Dec 14, 2013 -
I've become mildly obsessed with trying to improve the fuel efficiency of my old truck. I've already done all the basic things and I realize that I'm fighting physics at this point, but what else might I consider if I wanted to make a bit of a hobby out of it? [more inside]
posted by Scientist
on Nov 19, 2013 -
Do you have a Honda Fit or another compact car that you can recommend for a family of four? [more inside]
posted by Fairchild
on Jul 9, 2013 -
Why does my Subaru Forester smell like gasoline, and how can I make it not smell like gasoline? [more inside]
posted by escabeche
on May 20, 2011 -
Doing 60mph on an incline, I pressed down on the accelerator and nothing happened. What's going on? [more inside]
posted by zarq
on May 31, 2010 -
What could be some reasons why my gas mileage is very suddenly and dramatically craptastic? [more inside]
posted by desuetude
on Nov 22, 2009 -
I am disappointed in my relationship with my 97 Honda Civic. Maybe you can give me some advice. YANMM. [more inside]
posted by bunny hugger
on Sep 14, 2009 -
Is it safe to keep my radio on while I refill my car's gas?
posted by alitorbati
on Sep 1, 2008 -
Car help: why can't i fill up my tank? (hint: it has nothing to do with the economy) [more inside]
posted by speef
on Jul 31, 2008 -
Help us pick a car! We're looking for a good used family car. We have two daughters, a 2 1/2 year old and a newborn and need a car that can accommodate an infant car carrier without putting the front passenger's knees in the glovebox. [more inside]
posted by Reverend John
on Jun 5, 2008 -
When I push the gas pedal on my manual car down beyond where it accelerates, am I wasting gas? [more inside]
posted by yellowbkpk
on May 14, 2008 -
Simple tricks to improve MPG?
For instance, I've thought about removing the rear seats/internal molding to lighten my car. I've also thought about aero-improvements, such as moon-disc wheel covers, or even somehow making a cover over my rear wheel wells. I'll be removing my rear wing this weekend, but what other tweaks could I do? [more inside]
posted by raikkohamilonso
on Apr 29, 2008 -
Is it true that it is good for a car to fill it up with higher grade gas once in a while?
I usually fill up at Shell, and there is 87, 89 and 91 kinds of gas, with 87 being the cheapeast and 91 being the most expensive. I usually get 87. However, I heard that if you own a car and want it to last longer, it is beneficial to fill it up with the most expensive gas, to "clean the engine". Is that true? If so, what is the explanation behind it? I drive a 2002 Kia Rio, if that makes any difference.
posted by esolo
on Dec 22, 2007 -
how much money can I save by turning off air-conditioning when I drive? [more inside]
posted by esolo
on Sep 18, 2007 -
Who would I contact if I suspect a gas station has altered the pumps to give out less than a full gallon? [more inside]
posted by denimflavored
on May 9, 2006 -
What are the advantages (if any) of letting your car engine run idle to warm up before driving? [more inside]
posted by xoe26
on Jan 11, 2006 -
What happens when a Hybrid car (i.e. Prius) runs out of gas? Can it keep driving on the battery? [more inside]
posted by clgregor
on Dec 22, 2005 -
Sitting in a car today as my friend was filling her tank, and my colleagues and I wondered aloud why there doesn't seem to be a standard for which side of the car has the gas cap on it. The car we were in had it on the right, as do both my cars, but the others in the car had cars with the caps on the left. What logic do car manufacturers use to determine from which side fuel is delivered? Some vehicles have the delivery point at the rear, and I believe I once saw a car with the gas cap near the front somewhere. Anyone know a rough ratio of left / right on North American cars? If there is a majority, is it an ergonomics thing? Just curious.
posted by galto
on May 18, 2005 -