After doing extensive reading I decided to try Mexican diesel in my 2007 Dodge, truck ran great no problems at all. I only used Mexican diesel when hauling the 5th wheel so I don't know if there would be more build up if I was just "running around" and making only short trips.
2007 Dodge 3500 Quad 6.7 L Cummins
2006 SunnyBrook 32BKWS
wife Diane and 110lb German Shepherd "Tye"
I was hoping that Ed White would enter this discussion. He did a lot ofresearch and knows people who use the Mexican fuel with no problems. It is my understanding that your truck will do a regen when the DPF needs to be cleaned. And yes the HD truck dealerships as well as the Engine dealerships have a machine to clean out the DPF> If Ed is cooect that will not be necessary. AS for Mexico producing ULSD: I think you will find that the fuel in Mexico is not even LSD it is good old fashioned full strength joy juice. They just started to sell gasoline that is low sulfur. The rst of N.A> has had this for about 7 years or more. There is no compelling reason for Pemex to produce the new fuel. NO VEHICLES sold in Mexico need the fuel so why bother. Ya, they stated that by 2008 it would come online. Problem is the refinery that is supposed to produce the fuel has not been built. Border cities and maybe part of Baja probably get their fuel from SOB. Some of it may be ULSD but it would be so contaminated with Mexican fuel and LSD that I would not trust it to be compliant. Pemex has so many problems that ULSD and the environment are not high on the list.
CSADT, here is a link to another post that was posted yesterday. Diesel Fuel not available in northern Baja.
Bob & Betsy - USN Ret'd '78 & FL LEO Ret'd '03 FMCA #F203528 '05 HR Endeavor, 40PRQ w/400 Cummins - With -'05 GMC Sierra SLT, CC Z-71, the pusher '07 Arctic Cat 500A & Wilderness Kayak, riding in the pusher - Our Current Location
All of the EPA and manufacturer testing of the new DPF systems on the 2007+ trucks proves that the use of higher sulfur fuels causes NO problems whatsoever unless the high sulfur fuel is used continuously for more than 40,000 miles. After that, deterioration of the DPF does occur. The REAL reason that it is illegal to use other than ULSD in the trucks is because of the EMISSIONS. The extra sulfur causes emissions to exceed the EPA ratings. The reason that Ford, GM and Dodge threaten no warranty coverage is because using higher sulfur fuels for more than 40,000 miles does cause some deterioration in performance which, in turn, could cause warranty replacement costs for the Big 3. I have researched this topic to death - you can find lots of posts on the subject at www.dieselplace.com under the Fourth Generation (LMM) engines forum. There has not been a single case of DPF failure due to using Mexican fuel in any of the research I have done since early 2007. If you can find one, please let me know. It's a NON-ISSUE.
It may be a non-issue to you, however if I have an engine failure and the manufacture says to me, we dipped your tank and you have been using LSD and we have voided your warranty, then it becomes an issue with me. Sorry, you can do all the research you want, but the final decision lies with the manufacture not you and all diesel engine manufactures have said they will void the warranty if they find the engine being operated with LSD. I can't understand why you still try and lead people down a very expensive path with your statements.
I can scarcely believe that a car dealership is going to dip a tank and expect to get anything but 100% ULSD, unless someone lives right at the border. The USA isn't using pure, 100% ULSD, so I wonder how anyone, anywhere is going to prove anything by "dipping a tank". In my rig I will have flushed out ALL Mexican diesel two or three times over by the time I get hone. Maybe I am confused. Can someone explain this better?
You evidently don't live or visit areas that the dipping of tanks is a common operating method, normally looking for off road LSD, I do. But that is not the problem, the problem is most RVers don't have a spare $20K laying around to replace an engine if they do get their warranty cancelled. Believe me, if Ford, GM, Cat or Cummins even thought they could get out of a $20K warranty charge by simply dipping a tank, it will be done.
I'm not in the business of counselling people to take their vehicles to Mexico. There's nothing to be gained for me by doing so. My motive is entirely, 100%, based on my desire to see the truth about LSD and ULSD become general knowledge instead of people operating on inuendo and unsupported, misguided, beliefs.
The measure of whether I am correct is twofold - firstly in the EPA and manufacturer testing, which, I repeat, has failed to cause any problems in less than 40,000 miles of continuous use, and secondly, in the actual field evidence where there have been ZERO failures. You can do Google searches under these topics and read the evidence for yourself.
I repeat my challenge to prove me wrong - find anyone, anywhere, on any forum, who has had such a failure and you will have something to work with. In the absence of such a failure there remains no evidence whatsoever that any engine or DPF based emissions system will be harmed by a visit to Mexico involving less than 40,000 miles of continuous driving.
I urge you to visit dieselplace.com and search the posts on this topic under Fourth Generation LMM engines, and EPA testing, before making unsupported, unscientific statements about engine damage.
In closing, let me agree with the observations in a couple of postings above. If somebody suffered an engine failure of some type while there was LSD or other high sulfur fuel in the tank it would be a bit stupid to leave it there. The presence of LSD, if tested for, would complicate a warranty claim, even though there is no scientific basis for a conclusion that engine damage can be caused by using higher sulfur fuels.
Thanks for all your info Ed. I agree that there is very little real info out there but a whole lot of speculation. I read through most of the info you found detailing the testing of this issue and found it interesting.
To speak to the issue of diping to test diesel sulphur content, I think first evidence might be simply to look at the exhaust pipe color. I notice that there is no black residue (absolutely none) in the tailpie on my 2008 duramax after 5000km. I would guess that the tailpipe will show the typical black residue. Perhaps someone who has run the Mexican diesel could comment on the color of their exhaust pipe.
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