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, 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 and GM are offering similarly sized oil-burners for their trucks and SUVs.

You may remember the Dually Tundra 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.

Related GalleryToyota Tundra Diesel Dually Project Vehicle

[Source: Inside Line]