The 1MZ-FE with VVT-i is used in the Avalon, Highlander, Sienna and Camry. Toyota Racing Development offered a bolt-on TRD supercharger kit for the MY1997–2000 Camry, MY1998–2000 Sienna and MY1999–2000 Solara. 2000–2005 Toyota Estima/ Toyota Tarago/ Toyota Previa.1997–2001 Toyota Mark II Wagon (Japanese domestic market).1997-2003 Toyota Harrier (non-US markets).1994–2004 Toyota Avalon & 2000 Toyota Pronard (Avalon for Japanese domestic market).1993–2003 Lexus ES 300 & Toyota Windom ( Japanese domestic market).The 1MZ-FE was on Ward's 10 Best Engines list for 1996. It is very important to the life of these engines that oil changes are done on a regular basis. There was a class action lawsuit due to this problem. Another name for the issue was "engine sludge". It has bucket tappets and was designed for good fuel economy of 19 mpg ‑US (12 L/100 km 23 mpg ‑imp) city and 25 mpg ‑US (9.4 L/100 km 30 mpg ‑imp) highway without an overall performance trade-off. Horsepower ratings dropped after the Society of Automotive Engineers implemented a new power measurement system for vehicle engines, Toyota engines rated on 87 octane dropped the most, compared to the same engines used by Lexus rated on 91 octane. The 1MZ-FE is a 3.0 L (2,994 cc) dual overhead cam (DOHC) V6 engine. This engine has been phased out in most markets, replaced by variants of the new GR series. The result was less cylinder distortion coupled with the decreased weight of rotating assemblies, smoother operation at that engine speed, and increased engine efficiency. Toyota sought to enhance the drivability pattern of the engine (over the 3VZ) at exactly 3000 rpm, since that was the typical engine speed for motors cruising on the highway. The MZ family is a lightweight V6 engine of an all-aluminium design, using lighter weight parts than the heavier duty VZ block engines in an effort to lower production costs, decrease engine weight, and decrease reciprocating weight without sacrificing reliability. It uses multi-port fuel injection (MFI), four valves per cylinder, a one-piece cast camshaft and a cast aluminium intake manifold. The cylinders are lined with cast iron, and is of a closed deck design (no open space between the bores). The MZ series has an aluminium engine block and aluminium alloy DOHC cylinder heads. The Toyota MZ engine family is a piston V6 engine series.
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