Editing VTEC (section)

=== i-VTEC with Variable Cylinder Management (VCM) ===
In 2003, Honda introduced an i-VTEC V6 (an update of the [[Honda J engine|J-series]]) that includes Honda's cylinder deactivation technology which closes the valves on one bank of (3) cylinders during light load and low speed (below {{convert|80|km/h|mph|abbr=on}}) operation. According to Honda,
<blockquote>
VCM technology works on the principle that a vehicle only requires a fraction of its power output at cruising speeds. The system electronically deactivates cylinders to reduce fuel consumption. The engine is able to run on 3, 4, or all 6 cylinders based on the power requirement, essentially getting the best of both worlds. V6 power when accelerating or climbing, as well as the efficiency of a smaller engine when cruising.{{quote without source|date=April 2023}}
</blockquote>
The technology was originally introduced to the US on the 2005 [[Honda Odyssey (North America)|Honda Odyssey]] minivan, and can now be found on the Honda Accord Hybrid, the 2006 Honda Pilot, and the 2008 Honda Accord. Example: EPA estimates for the 2011 (271&nbsp;hp SOHC 3.5L) V6 Accord are 24 mpg combined vs. 27 in the two 4-cylinder-equipped models.

i-VTEC VCM was also used in the [[Honda L engine#LDA-MF5 (3stage i-VTEC + IMA)|1.3-liter LDA engine]] used in the 2001-2005 [[Honda Civic Hybrid]].<ref>{{cite web |url=http://autospeed.com/cms/title_Honda-Civic-Hybrid-Technology/A_3067/article.html |title=Honda Civic Hybrid Technology |publisher=Autospeed.com |access-date=2010-12-04 |archive-date=2011-07-28 |archive-url=https://web.archive.org/web/20110728125450/http://autospeed.com/cms/title_Honda-Civic-Hybrid-Technology/A_3067/article.html |url-status=live }}</ref>