{"id":430,"date":"2010-08-07T20:21:20","date_gmt":"2010-08-08T03:21:20","guid":{"rendered":"http:\/\/mcclanahoochie.com\/blog\/?p=430"},"modified":"2023-03-05T17:08:54","modified_gmt":"2023-03-06T00:08:54","slug":"idle-fuel-consumption-ac-vs-no-ac","status":"publish","type":"post","link":"https:\/\/mcclanahoochie.com\/blog\/2010\/08\/idle-fuel-consumption-ac-vs-no-ac\/","title":{"rendered":"Idle Fuel Consumption | A\/C On vs. A\/C Off"},"content":{"rendered":"<p>I was curious about how much gas was actually\u00a0saved when idling my car with the A\/C off, so I gathered some fuel\u00a0efficiency\u00a0numbers using the\u00a0<a href=\"http:\/\/www.youtube.com\/watch?v=4lAbZnaws5E\" target=\"_blank\" rel=\"noopener\">MPGuino<\/a> I <a href=\"http:\/\/mcclanahoochie.com\/blog\/portfolio\/mpguino\/\" target=\"_blank\" rel=\"noopener\">made<\/a> for my 2002 Honda Civic. The MPGuino can display the instant <em>Gallons Per Hour<\/em> (GPH) consumed, and this measurement was used for these tests.<\/p>\n<p>Testing Notes:<\/p>\n<ul>\n<li>All tests were performed on a hot summer day, with the car <em>warmed up<\/em> after driving around\n<ul>\n<li>In colder temperatures, the gas consumption may be even more<\/li>\n<\/ul>\n<\/li>\n<li>The instant GPH was averaged over 10 seconds for each test<\/li>\n<li>The gear shifter was either in <em>Park<\/em> or <em>Drive<\/em><\/li>\n<li>In all tests, <strong>the car was\u00a0stationary, <\/strong>with the brakes on<\/li>\n<li>The fan mode was either in <em>Recycle <\/em>(re-circulate) or <em>Vent <\/em>(pass-through)<\/li>\n<li>The\u00a0<a href=\"http:\/\/ecomodder.com\/wiki\/index.php\/MPGuino\" target=\"_blank\" rel=\"noopener\">MPGuino<\/a> may not be 100% calibrated for the exact GPH, but it is close so the relative difference between the tests shouldn&#8217;t change much<\/li>\n<li>For reference, cruising flat at 55 MPH on the highway is about ~1.4 GPH, for my Civic.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/spreadsheets.google.com\/oimg?key=0Akacmsp16SQtdFJDOEFnOXBVTTZwc055QXdlRmxrakE&amp;oid=2&amp;zx=dlz9ilw717ri\" alt=\"\" width=\"764\" height=\"287\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignnone\" src=\"https:\/\/spreadsheets.google.com\/oimg?key=0Akacmsp16SQtdFJDOEFnOXBVTTZwc055QXdlRmxrakE&amp;oid=4&amp;zx=ph9imcjsb3qs\" alt=\"\" width=\"762\" height=\"296\" \/><\/p>\n<p>Idle Fuel Consumption Analysis Notes:<\/p>\n<ul>\n<li>The baseline for the bottom graph was the car\u00a0idling\u00a0with the A\/C and fan off<\/li>\n<li>I was surprised to find that the car A\/C and fan is more\u00a0efficient\u00a0when in Park\/Neutral vs Drive.\n<ul>\n<li>This is probably due to the torque converter being engaged when in Drive<\/li>\n<\/ul>\n<\/li>\n<li>While these numbers are for just the car idling, I suspect that the relative differences would also translate while driving.<\/li>\n<li>Idling with the A\/C on uses ~50% more fuel than with the A\/C and fan off<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>I was curious about how much gas was actually\u00a0saved when idling my car with the A\/C off, so I gathered some fuel\u00a0efficiency\u00a0numbers using the\u00a0MPGuino I made for my 2002 Honda Civic. The MPGuino can display the instant Gallons Per Hour (GPH) consumed, and this measurement was used for these tests. Testing Notes: All tests were &#8230; <a title=\"Idle Fuel Consumption | A\/C On vs. A\/C Off\" class=\"read-more\" href=\"https:\/\/mcclanahoochie.com\/blog\/2010\/08\/idle-fuel-consumption-ac-vs-no-ac\/\" aria-label=\"Read more about Idle Fuel Consumption | A\/C On vs. A\/C Off\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[78,33,179,227,228],"class_list":["post-430","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-arduino","tag-car","tag-comparison","tag-fuel-consumption","tag-idle"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pZdXI-6W","jetpack-related-posts":[{"id":877,"url":"https:\/\/mcclanahoochie.com\/blog\/2011\/01\/mpguino\/","url_meta":{"origin":430,"position":0},"title":"MPGuino (Arduino for Car MPG)","author":"mcclanahoochie","date":"January 1, 2011","format":false,"excerpt":"August 2009 This is an\u00a0Arduino microcontroller that I wired into my car's ECU and programmed to calculate the instantaneous\/average miles per gallon of my 2002 Honda Civic. The circuit reads pulses from the Vehicle Speed Sensor and Fuel Injector wires. It\u00a0is wired into my car via a USB cable. It's\u2026","rel":"","context":"In \"arduino\"","block_context":{"text":"arduino","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/arduino\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2011\/01\/mpguino.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":873,"url":"https:\/\/mcclanahoochie.com\/blog\/2011\/01\/pic-digital-speedometer\/","url_meta":{"origin":430,"position":1},"title":"PIC Digital Speedometer","author":"mcclanahoochie","date":"January 1, 2011","format":false,"excerpt":"June 2008 I used a PIC microcontroller in a circuit to measure my car's MPH.\u00a0It measures the frequency of pulses from the\u00a0Vehicle Speed Sensor,\u00a0and converts it to miles-per-hour. A summer project involving programming a PIC micro controller to measure my Honda Civic's MPH. The circuit I made measures the frequency\u2026","rel":"","context":"In \"car\"","block_context":{"text":"car","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/car\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2011\/01\/digitalspeedo.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":884,"url":"https:\/\/mcclanahoochie.com\/blog\/2011\/01\/sprime\/","url_meta":{"origin":430,"position":2},"title":"SPRIME","author":"mcclanahoochie","date":"January 1, 2011","format":false,"excerpt":"April 2010 Simple Powerline Remote Interactive Monitor and Enforcer SPRIME\u00a0 is an outlet that allows\u00a0you to monitor power consumption and control power usage remotely, using a\u00a0computer or even an Android phone. SPRIME is an open-source smart-grid technology. \u00a0 \u00a0 SPRIME GT-RNOC\u00a0poster: \u00a0 SPRIME\u00a0pictures: \u00a0 \u00a0 Awards SPRIME has made it\u2026","rel":"","context":"In \"arduino\"","block_context":{"text":"arduino","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/arduino\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2011\/01\/sprime-icon.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":3152,"url":"https:\/\/mcclanahoochie.com\/blog\/2015\/04\/diy-cell-phone-car-mount\/","url_meta":{"origin":430,"position":3},"title":"DIY cell phone car mount","author":"mcclanahoochie","date":"April 22, 2015","format":false,"excerpt":"In early 2012, I invented a way to easily mount my phone in my car, via velcro: If you don't mind using strips of velcro on the dash of your car, you can create a very easy DIY car mount for your phone, right on your dash! After a few\u2026","rel":"","context":"In \"car\"","block_context":{"text":"car","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/car\/"},"img":{"alt_text":"DSC_2379-6_Di_2012","src":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2015\/04\/DSC_2379-6_Di_2012-1024x512.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2015\/04\/DSC_2379-6_Di_2012-1024x512.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2015\/04\/DSC_2379-6_Di_2012-1024x512.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":883,"url":"https:\/\/mcclanahoochie.com\/blog\/2011\/01\/droid-mods\/","url_meta":{"origin":430,"position":4},"title":"Droid Mods","author":"mcclanahoochie","date":"January 1, 2011","format":false,"excerpt":"April 2010 \u00a0 I got a chance to use a 3D Printer and a Laser Etcher in one of my undergraduate CS\u00a0classes.\u00a0I took the opportunity to make some Motorola Droid mods. I got to laser etch a\u00a0sun onto the\u00a0back of my Droid's battery cover. I also 3D printed\u00a0a car\u00a0mount for\u2026","rel":"","context":"In \"projects\"","block_context":{"text":"projects","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/projects\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/mcclanahoochie.com\/blog\/wp-content\/uploads\/2011\/01\/sun.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2112,"url":"https:\/\/mcclanahoochie.com\/blog\/2012\/03\/taken-while-driving-2\/","url_meta":{"origin":430,"position":5},"title":"Taken While Driving","author":"mcclanahoochie","date":"March 14, 2012","format":false,"excerpt":"I find it really fun to take\u00a0pictures\u00a0while\u00a0driving\u00a0around in my car \u2014 it keeps me\u00a0entertained and the driving more fun :)\u00a0. I\u00a0simply\u00a0hold up my\u00a0camera, point the camera out my sun\u00adroof or\u00a0window, and hope for the best! \u00a0I've gathered up a gallery below: See the gallery\u00a0[HERE];\u00a0it's made over the past year or\u2026","rel":"","context":"In \"driving\"","block_context":{"text":"driving","link":"https:\/\/mcclanahoochie.com\/blog\/tag\/driving\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/lh4.googleusercontent.com\/-6jOhzcSoijw\/T1wC56QiTtI\/AAAAAAAAF0M\/xed8f95f2Sw\/s932\/DSC_0231%2B-%2BVersion%2B2.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"jetpack_likes_enabled":false,"_links":{"self":[{"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/posts\/430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/comments?post=430"}],"version-history":[{"count":0,"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/posts\/430\/revisions"}],"wp:attachment":[{"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/media?parent=430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/categories?post=430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcclanahoochie.com\/blog\/wp-json\/wp\/v2\/tags?post=430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}