You could save as much as 1 percent on your fuel economy simply by switching from a 15W-40 engine oil to a 10W-30 engine oil, according to new research from Chevron Oronite. A research paper, titled ...
For 2010, the U.S. Department of Energy expects diesel prices to average nearly $3 a gallon. As diesel prices head back up, it may be time to look at the possibility of switching to a more ...
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