Posted by Mac from Texas [216.81.94.73] on Tuesday, November 10, 2015 at 10:00:06 :
In Reply to: M37CDN, 251s, and Unleaded Gas posted by Greg Coffin [67.176.56.44] on Monday, November 09, 2015 at 21:26:10 :
My WC12 runs a 251 CDN no issues with 12 years of running unleaded gas looked good when I changed the head gasket in 2011 had the truck since 2002.