The ONLY difference between one brand of gas or diesel and another is the additive package - which includes any ethanol and/or biodiesel. That is also what colors the fuel. The feedstocks have been standardized. They dispense the appropriate additive at the Terminal depending on which retail station is buying the fuel (BP, Marathon, whatever). Each company maintains their own supply of additive at each terminal under lock and key.
BP started producing ULSD fuel over a year before it was mandatory so they could comply with the regs through dilution and avoid cleaning all the underground tanks. If you thin diesel with gasoline or kerosene you are screwing up the additive mix and putting your injection pump at risk. A Bosch-style inline pump could care less. The 25,000+psi system in a CDI will care greatly and you will pay dearly. -Dave Walton On Nov 7, 2011, at 6:46 PM, Jim Hoffman <jsl...@sbcglobal.net> wrote: > Sure, but I would assume that Greg was referring to same time of year, > etc. so you would be able to ignore blending discrepancies. > > So, how do we find cetane ratings? And just what does cause the > differences in color between some distributors?? Poorer quality? > I see no notices on pumps around here about blending with biodiesel. > > Jim > > > --- On Mon, 11/7/11, john <j...@wagoneers.com> wrote: > >> From: john <j...@wagoneers.com> >> Subject: Re: [db] Diesel Fuel Differences? >> To: "Greg Fiorentino" <gf...@dslnorthwest.net> >> Cc: diesel-b...@digest.net, "'Mercedes Discussion List'" >> <mercedes@okiebenz.com> >> Date: Monday, November 7, 2011, 5:23 PM >> there are a variety of factors. >> >> 1) cetane rating >> 2) mix of bioDiesel >> 3) is it #1 or #2 or blended? (depends on region, here in >> the PNW all we see is #2) >> >> #1 used in the winter is a weaker mix, less cetane but >> lower pour point to avoid gelling. >> #2 will have more power but gels in the 34 degree >> neighborhood. >> >> (hint to those travelling from warm to cold climates... if >> you expect cold weather, that is >> in the low 30's to teens even, add ONE GALLON of regular >> unleaded to about 20 gallons of Diesel, >> this will prevent gelling - you can also use a mix of >> Kerosene and Diesel, say 50-50 or so, YMMV, >> but Kerosene is really spendy stuff... You can also >> use an additive to prevent gelling, but >> I have never had problems putting a gallon of that really >> bad smelling stuff called gasoline... ;) >> >> >> unlike octane ratings I know of no requirement to post the >> provided Cetane rating... >> >> adding gasoline to Diesel results in thinning, but also a >> more rapid burn, so be careful not >> to add too much or you'll melt pistons... don't lug >> it when using gas as a thinner... >> >> >> there is often a note on the brand names that say "up to >> 5%" bioDiesel". >> >> bioDiesel lowers mileage and energy... typically... unless >> it's made from the really good stuff... >> which isn't usually the case. >> >> the Ultra low sulfur fuel can be a concern for lubricity... >> I think that's why they are mixing >> in some bioDiesel, from what I've read BioDiesel has >> greater lubricity than regular Diesel. >> >> California got their chops busted when they pulled sulfur >> from the fuel and wiped out a bunch >> of big rig's pumps... >> >> >> selfish plug: amsoil sells some fine fuel additives >> and conditioners, one of the products >> is called cetane boost, the link in my sig file will get >> you to the info, sales pitch and an opportunity >> to purchase and provide a tired old webmaster some lunch >> money... ;) >> >> ----- >> ------------------------------------------------------------------------ >> >> -o|||||o- fahrvergnugen y'all >> Snohomish, Washington - where Jeeps and VWs don't >> rust, they mold >> http://AMSOIL.com/redirect.cgi?zo=283461 >> TRSTGZS >> http://JohnMeister.com HTTP://WAGONEERS.COM http://fotomeister.us >> ------------------------------------------------------------------------ >> >> >> On Mon, 7 Nov 2011, Greg Fiorentino wrote: >> >> # One of my mechanics swears that some diesel brands yield >> significantly >> # better economy than others. My wife subscribes to >> this theory also. Based >> # on recent unscientific and statistically insignificant >> tests, I am beginning >> # to think this may be so. >> # >> # >> # >> # Do any of you experienced dieselers care to weigh in on >> this sure-to-be >> # controversial topic? >> # >> # >> # >> # Greg >> # >> > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
