Latest thoughts on Zinc and additives

[c00nhunterjoe]

https://www.epa.gov/diesel-fuel-standards/diesel-fuel-standards-and-rulemakings

Or you can read it on the governments own website. Same about gasoline.

[bakerhillpins]

Sign's 2nd sentence clearly state "reccomended for all diesel engines"

recommended - advised or suggested as good or suitable.

There's nothing in that statement that states that it is the correct fuel for every application/engine.  It's simply a recommendation, it's up to the user to validate correct application.  In fact your probably never going to see that because there is always an exception.

https://www.epa.gov/diesel-fuel-standards/diesel-fuel-standards-and-rulemakings

Or you can read it on the governments own website. Same about gasoline.

I've read through several pages of the on road information. Unless I'm missing something that you can point me to I don't see any text that specifically states that these fuels are, or are not, backwards compatible with ALL diesel engines. It's lots of information on the supported levels of sulfur, emissions, phase in years, and year of required support by vehicle MFGs. I don't see anything beyond that.

[John_Kunkel]

The big problem with the low-sulfur fuel in older engines is the fuel system O rings, the older O rings would shrink and were replaced by a different material that also shrank with age...the latest O ring material seems top be holding up.