Filed under: SUVs (http://www.autoblog.com/category/suvs/), Trucks/Pickups (http://www.autoblog.com/category/trucks/), Green (http://www.autoblog.com/category/green/), Toyota (http://www.autoblog.com/category/toyota/)
http://www.blogsmithmedia.com/www.autoblog.com/media/2008/05/sema07_tundradiesel_opt.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464116/)
Click above for high-res gallery of the Diesel Dually Tundra

Toyota has earned its reputation for producing fuel efficient vehicles, but one dent in the Japanese automaker's armor has been the gas-guzzling Tundra and Sequoia. To help rectify the situation (http://www.autoblog.com/2008/01/13/detroit-2008-toyota-gets-greener-with-new-diesels-hybrids-and/), Toyota Engineers have been working hard on a 4.5L clean-diesel powerplant that will substantially improve fuel economy for the body-on-frame trucks. The 4.5L engine is reportedly scheduled to arrive Stateside by 2010, and it's a no-brainer in light of the fact that both Ford (http://www.autoblog.com/2008/04/13/new-2010-ford-4-4-liter-diesel-engine-scooped/) and GM (http://www.autoblog.com/2008/05/05/gm-releases-details-on-upcoming-4-5l-duramax-turbo-diesel-v8/) are offering similarly sized oil-burners for their trucks and SUVs.

You may remember the Dually Tundra (http://www.autoblog.com/2007/10/31/sema-2007-video-toyota-tundra-diesel-dually/) fantasy truck that was shown last year at SEMA. Well, this news means the mega-sized diesel may not be far from reality. Inside Line is also reporting that Toyota may be delivering a monstrous 7.0L diesel for a commercial-grade Tundra, with a possible production date around 2011-2012. Toyota still hasn't given the go-ahead for a heavy duty Tundra, so the king-sized diesel powerplant likely will arrive only if the larger Tundra does, too.

Gallery: Toyota Tundra Diesel Dually Project Vehicle (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/)
http://www.blogsmithmedia.com/www.autoblog.com/media/2007/10/sema07_tundradiesel---01_thumbnail.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464116/)http://www.blogsmithmedia.com/www.autoblog.com/media/2007/10/sema07_tundradiesel---02_thumbnail.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464112/)http://www.blogsmithmedia.com/www.autoblog.com/media/2007/10/sema07_tundradiesel---04_thumbnail.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464119/)http://www.blogsmithmedia.com/www.autoblog.com/media/2007/10/sema07_tundradiesel---05_thumbnail.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464123/)http://www.blogsmithmedia.com/www.autoblog.com/media/2007/10/sema07_tundradiesel---06_thumbnail.jpg (http://www.autoblog.com/photos/toyota-tundra-diesel-dually-project-vehicle/464124/)

[Source: Inside Line (http://www.edmunds.com/insideline/do/News/articleId=126532)]
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