Quote:
Originally Posted by Dave Turner
Kevin, I ran my 2003 F250 6.0l to 425,000k on Royal Purple 15W40 and the current 2011 F250 6.2l has seen almost 70,000k running on RP 5w20 since I bought it at 125,000.
(....besides, we sell the stuff  ) |
Dave, I used to sell the stuff when I worked for NAPA and I recall the back of the bottle stating in fine print that it should not be used in 2005 or maybe 2008 and newer vehicles. Has that changed ? My daily driver vehicles all use Valvoline.