XPI fuel system

ISX 12-liter for regional, vocational hauls

GEAR GUIDE/The ISX12, built for regional hauls and vocational and specialty applications, uses components of the big-bore ISX15 to offer more power and better fuel economy than its predecessor, the ISX11.9, the company says.

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Oil & 2010 Tech

Most manufacturers have yet to extend change intervals, but oil seems to thrive in the new engines.

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