Posted 12/26/2008 21:52 (#547822 - in reply to #547739) Subject: Re: SSYNTHETIC OIL IN OVER THE ROAD TRUCKS
Chillicothe, Missouri
the lighter weight oil will really help with cold weather startup lubrication. in my dually, it reduced engine rattle an extreme amount, when I switched from 15w40 to 5w40 synthetic.