Rusty, that
Gates 4219-0102 hose is
Nitrile*, inside and out (see #1 scan below) and while Nitrile has an excellent compatibility rating with "
straight diesel"*, and it
did meet the "
standards of it's day"*, times are changing, and not all of us have, or are going to have, the luxury of running "straight diesel"...
This is what I've come to understand, for example, starting in May, Minnesota has mandated a 20% biodiesel blend for on-road vehicles Apr.- Sep. (see #2 scan below). From many sources I've read, It's important to note that B20 seems to be the
threshold, or line, after which materials compatibility, including nitrile, can degrade rapidly. On a personal note, from what I've read, I DON'T want any significant % of biodiesel blend sitting in my tank with a nitrile hose. Nitrile has been given a "poor" or "unsatisfactory" rating in compatibility with biodiesel (see #3 scan/"Military Study" below). The higher the biodiesel blend the more the nitrile is effected. For newer nitrile hoses, B20
might not be a problem. Could be bad for old nitrile hoses in deuce tanks (Biodiesel effects are extensively pointed out in bottom paragraph, scan #3 "Military Study" below).
I know that not all of us live in an area where biodiesel/blend has been mandated, but I don't believe any of us knows what our gubment is going to mandate next, or what's coming out of any given pump we pull up to. Remember the addage;
"Change is the only thing that is constant". So, the additional $10 might be a good investment, putting something in the tank that we won't have to worry about if/when a higher biodiesel blend comes our way.
When I work on my truck, I do stuff like selectively applying anti-seize to fasteners, even the ones I'm sure I'll never have to remove again in my lifetime. I use Dielectric grease, even on brand new electrical connections, and even though I live in a semi-arid climate. I've spent more money on Viton o-rings and seals when the typical stuff would've sufficed. And I'll be replacing my old nitrile hose with Viton, to compliment my new pump. Even though my truck isn't "stock" I do these things because I consider myself the steward of that 50+ year old chunk of nostalgia, and I want it to be around long after I'm gone, even if it's "the next guy" that reaps the benefits of me doing those silly "down-the-road" preventative things. And I'm sure I'm not the only one on this forum that does these things or thinks this way.
Respectfully,
Menaces Nemesis
, AKA; "Some New Guy"... (Who has been the owner-operator of a Dealers-only automotive reconditioning business for over 25 years, and a manufacturer/supplier to Brownells Inc., the largest gunsmithing supplier on the planet. FWIW, going on 40 years in the work force, I don't feel so "new" anymore.)
In response to Rusty's #136 post, on behalf of myself, The Gates Corporation, The Minnesota Dept. of Agriculture, The National Biodiesel Board, U.S. Army TARDEC, and all the rest of us "Liars" out there, please enjoy a song from the late, great George Jones...
https://www.youtube.com/watch?v=GlbgI_Dq3vo