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post #4 of (permalink) Old 01-28-2018, 10:41 PM
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Join Date: Sep 2002
Location: Fulltime RVer
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My understanding is that Ford's PM-22a (I left off that "a" earlier) is a cetane booster and now recommended for use if you're in an area running lower quality fuel (per our owner's manual). It - or something similar - was pretty much a requirement to get long life out of the fuel pumps on the 6.4L. I use it just to be "safe". David

2001 F250 7.3L PSD Lariat CC 4x4; Sold Jan 2009
2009 F450 Pickup Lariat Plus w/Nav, 4X4 Off-Road Pkg; Sold Feb 2017
2017 F350 6.7L PSD CC DRW Platinum 4x4

2011 MS 36RSSB3 w/vanity slide and a nice 4,285 lbs of hitch weight
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