Off Topic A place for you truck junkies to boldly post off topic.

Many Factors Effect Fuel MPG

Old 06-02-2013, 12:06 PM
In2Trux's Avatar
Thread Starter
Join Date: Feb 2010
Location: Northern Ont
Posts: 1,743
Default Many Factors Effect Fuel MPG

Quick acceleration and heavy braking can reduce fuel economy by up to 33 percent on the highway and 5 percent around town. New EPA tests account for faster acceleration rates, but vigorous driving can still lower MPG.
Excessive idling decreases MPG. The EPA city test includes idling, but more idling will lower MPG.
Driving at higher speeds increases aerodynamic drag (wind resistance), reducing fuel economy. The new EPA tests account for aerodynamic drag up to highway speeds of 80 mph, but some drivers exceed this speed.
Cold weather and frequent short trips can reduce fuel economy, since your engine doesn't operate efficiently until it is warmed up. In colder weather, it takes longer for your engine to warm, and on short trips, your vehicle operates a smaller percentage of time at the desired temperature. Note: Letting your car idle to warm-up doesn't help your fuel economy. It actually uses more fuel and creates more pollution.
Cargo or cargo racks on top of your vehicle (e.g., cargo boxes, canoes, etc.) increase aerodynamic drag and lower fuel economy. MPG tests do not account for this type of cargo.
Towing a trailer or carrying excessive weight decreases fuel economy. Vehicles are assumed to carry only three hundred pounds of passengers and cargo during testing.
Running electrical accessories (e.g., air conditioner) decreases fuel economy. Operating the air conditioner on "Max" can reduce MPG by roughly 5-10% compared to not using it.
Driving on hilly or mountainous terrain or on unpaved roads can reduce fuel economy. The EPA test assumes vehicles operate on flat ground.
Using 4-wheel drive reduces fuel economy. Four-wheel drive vehicles are tested in 2-wheel drive. Engaging all four wheels makes the engine work harder and increases transfer case and differential losses.
Old 06-02-2013, 04:43 PM
NullHead's Avatar
TruckForum Addict
Join Date: Apr 2011
Location: Detroit, MI
Posts: 1,227

Basically, driving your car reduces fuel economy.

The more it sets in your driveway, the higher the fuel economy goes up! :P
Old 06-02-2013, 05:55 PM
In2Trux's Avatar
Thread Starter
Join Date: Feb 2010
Location: Northern Ont
Posts: 1,743

HaHaHa. Very true.

Turning the key forward = bad fuel economy
Turn key backward = great for fuel economy
Old 06-05-2013, 09:54 PM
Join Date: Sep 2012
Posts: 43

Maybe I should get a horse to get to work and trade in the lawnmower in on a
Related Topics
Thread Starter
Last Post
Ford General Tech
01-24-2019 11:38 PM
Chevy Silverado/ GMC Sierra Forum
03-19-2011 04:16 PM
Chevy Silverado/ GMC Sierra Forum
10-06-2010 06:56 AM
Chevy Silverado/ GMC Sierra Forum
11-15-2009 05:55 PM
Dodge/ Ram 1500 Forum
02-24-2008 10:18 PM

Thread Tools
Search this Thread
Quick Reply: Many Factors Effect Fuel MPG

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.