Ecotec (capitalized ECOTEC, from 'Emissions Control Optimisation TEChnology') is a General Motors (GM) trademark that refers to a series of emissions technologies that were implemented throughout a range of GM engines. ECOTEC can refer to the following diesel and petrol engines produced by General Motors:
- Ecotec Family 1 - straight-four SOHC/DOHC engines produced by Adam Opel AG, GM Korea, and GM do Brasil.
- Ecotec Family II - straight-four SOHC/DOHC engines produced by Adam Opel AG, Holden, and GM do Brasil.
- Ecotec L850 - straight-four all-aluminium DOHC engines produced by Adam Opel AG, GM Powertrain US, and Saab.
- Ecotec V6 - a version of the Series II 3800 V6 engine, produced by the Holden Engine Company between 1995 and 2004.
- CDTI (Common Rail Diesel Turbo Intercooled) Ecotec - common rail diesel engines for Opel/Vauxhall cars:
- VCDi Ecotec - common rail diesel engines for Chevrolet and Holden cars, produced by GM Korea (a licensed VM Motori RA 420 SOHC and Family Z).
- DTI (Diesel Turbo Intercooled) Ecotec - diesel engines for use in Opel/Vauxhall cars, produced by Isuzu (Circle L)
- SIDI (Spark Ignition Direct Injection) Ecotec - petrol Medium Gasoline Engine produced by Adam Opel AG
- Ecotec3 is the name used on General Motors' Small Block Gen 5 Engines. All include direct injection, cylinder deactivation and continuously variable valve timing, either in V6 form of 4.3L or V8 form of either 5.3 or 6.2 liters.
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