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Conservative estimates for oil-change intervals used to be as low as 3000 miles, before significant improvements in fuel-delivery systems, engine materials, manufacturing methods, and oil chemistry.
In 2010, for the 2011 model year, Toyota made some changes to the Highlander and Highlander Hybrid. While the general design remains similar to the 2008-2010 model, the Highlander's front end has been significantly revised, now featuring new headlights, a new black with chrome accent rocker panel, and new front grille.
With modern synthetic oils and new tests such as BMW's LL ("long life") oil specifications, most current cars can go over 6,000 miles (9,700 km) before needing an oil change. Even most modern conventional oils (also called mineral oils) can take a car engine at least 5,000 miles (8,000 km) before needing an oil change. [1] [2] [3] [4]
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 result was less cylinder distortion coupled with the decreased weight of rotating assemblies, smoother operation at that engine speed, and increased engine efficiency.
A 2.7 L version of the AR family, first released in the Venza [1] and Highlander in late 2008. [2]The 1AR-FE most likely ended production in 2020. No official statements were made by Toyota about the engine's status, however, no new cars used this engine after 2020.
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