Editing Variable displacement (section)

===Cadillac L62 V8-6-4===
[[File:81 Cadillac Sedan de Ville V864 (13923375327).jpg|thumb|Cadillac V8-6-4 emblem]]
First experiments with multiple-cylinder engines during [[World War II|WWII]],<ref name="cylinder">{{cite web|url=http://www.findarticles.com/p/articles/mi_m3012/is_1_185/ai_n9532648|title=FindArticles.com - CBSi|website=www.findarticles.com}}</ref> were re-attempted in 1981 on [[Cadillac]]'s ill-fated [[Cadillac V8 engine#V8-6-4|''L62'' "V8-6-4"]] engine. The technology was made a standard feature on all Cadillac models except [[Cadillac Seville|Seville]], which had the 350 diesel V-8 engine as a base engine. Cadillac, in conjunction with [[Eaton Corporation]], developed the innovative V-8-6-4 system which used the industry's first [[engine control unit]] to switch the engine from 8- to 6- to 4-cylinder operation depending on the amount of power needed.<ref name="cylinder"/> The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. The cars had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditioning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.<ref name="cylinder"/>