I've been through this exact thing with oil companies over Spec oil for Detroit Diesel 2 stroke 8V71 engines. The spec says straight 40 wt , low ash oil with a spec for exactly what low ash is. All the oil companies decided that since EPA has nearly regulated the 2 stroke diesel out of existence they would simply "re-brand " their oils. The result was that they , without warning, changed the spec formulation and still called it by the "safe" name. The new oil , under the old name, no longer met Detroit specs.
Sounds like same thing has happened in this case. What we had to do was do a very detailed point by point comparison of the Spec sheet for the old formulation [the approved one] and every other brand on the market to find who still met the old spec. Lot of work, but worth the effort. Overhaul cost on an 8V71 these days from oil failure runs in the $12 to $20 grand range. Ouch. >From experience, the sales reps will blow smoke up your exit orifice any time they don't know or don't care what the "right" answer is. Published specs are available , you have to ask for them.... sometimes more than once. Grant.. Doesn't own anything with a spark plug. AZ On Fri, Jul 1, 2011 at 7:04 PM, Curt Raymond <curtlud...@yahoo.com> wrote: > I emailed Mobil and got a reply that since CF was discontinued they removed > it from the bottle but that it still meets CF spec. I thought CI and CI-4 > replaced CF years ago or is that not how that works? > > Anyway it sounds a lot like the sort of think a marketing drone would say. > > -Curt > > Date: Fri, 1 Jul 2011 11:17:36 -0700 (PDT) > From: Curt Raymond <curtlud...@yahoo.com> > To: Diesel List <mercedes@okiebenz.com> > Subject: Re: [MBZ] M1 15w50 > Message-ID: > <1309544256.26136.yahoomailclas...@web161013.mail.bf1.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Mobil's website still says CF for the 15w50, I wonder if the website is > just behind the times... > > -Curt > > --- On Fri, 7/1/11, Curt Raymond <curtlud...@yahoo.com> wrote: > > > From: Curt Raymond <curtlud...@yahoo.com> > > Subject: M1 15w50 > > To: "Diesel List" <mercedes@okiebenz.com> > > Date: Friday, July 1, 2011, 2:13 PM > > Grabbed 8 quarts of M1 15w50 > > yesterday, I need to change the oil in my '78 240D. I like > > using the 15w50 in the summer as it leaks/is consumed a bit > > more slowly. > > > > Anyway today doing the change I learned 2 things, > > > > #1 oil filters from Car Quest are NOT as good as from Rusty > > - the o ring is too big and won't seal the canister, > > fortunately I had a spare. I though I had a filter from > > Rusty, turns out it was for a 601 > > > > #2 M1 15w50 is no longer diesel rated, SM only. I had an > > older bottle that was CF that was probably bought last year > > (post facelift, so recent). I dunno if the manufacturer has > > to continuously pay for certification and they decided they > > weren't selling enough to diesel owners or what but I'll run > > a short change on this one (I usually go 7,000 on the 240D, > > I'll go down to 5 or so) and switch back to 5w40 which I > > hope still has a C certification, if not it maybe be Amsoil > > although my local Car Quest has Royal Purple... > > > > -Curt > > > > > > _______________________________________ > 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
