i was fuelling my semi at the ta today and just noticed the sticker on the pump about ultra low sulpher fuel.i remember when the low sulpher fuel first came about and wreaked havock on older fuel systems.whats this stuff gonna do?

 

ULS is very bad for older injection systems you MUST run some sort of lubricant additive or it Will mess things up I know from experiance and I'm sure its not good for any thing that wasn't designed for it either. Good thing they came out with the stuff i was getting real tired of all the acid rain it was causing! sarcasm intended. I doubt the lower sulfer content in the fule lowered the amout emited because the stuff is less eficiant so you have to burn more of it.

Did you just notice the sticker or did seeing it today just get you thinking? Cause ULS has been the only thing you can get at 99% of on road stations for quite a while now.

 

for every 100 gallons of fuel add 1 quart of automatic trans fluid but keep the empty jug in the truck with you (in case they dip your fuel). I have run it in my Peterbilt before when thats all I could get. It will dry out your orings in your pump and injectors if you dont add something. If your only going to run it once and a while aft is the cheepest way and all fuel stops have it.

 

i knew about the lsd not the Ulsd.

 

I like Diesel Klean ULSD formula it lubricates, cleans injectors and pumps and boosts cetain. Also it saved my injection pum when the garbage they call fule heer jamed up my advance.

 

well i usually use lucas fuel additive.but i was wondering should i up the dosage for the ulsd.pretty soon there just gonna have water for fuel.

 

ULSD does not have sufficient lubricity for the older mechanical injection pumps
in case you are wondering why they would require us to use fuel that can damage our fuel systems.
the EPA wants our trucks off the road

 

I don't think its that bad on our diesels. At work i bet we have 40 or more 7.3 idis in our package trucks that run pedal to the metal every day 5 days a week from 8 am to 6 pm and many of them at 200 miles a day with with only one injection pump failuar within this last year which had almost 150km on it. These guys absolutyly torture these engines and they still hold up. We have been putting in ulsdiesel for a year now with no trouble at all. We even have some tractors with the old V-mac II injection systems with the electronically controled mecanical bosh injection pump (looks like the cummins only bigger) and no injection pump failers yet. I have 3 in my fleet which run from 500 miles a day to nearly 1000 miles which some run day and night. Some trucks get back and another driver jumps in and takes it. Theres probably 15 v-mack II total here. We do not add any additave to our fuel even to my own personal truck which is a 7.3 idi. I kinda wonder if its just something people can blam for having an issue cause how do we know it wasn't going to fail anyway. Theres always the chance of poor quality parts, rebuild and qoiencidence (however you spell that). besides fuel is so expencie anyway if I have to start buying additavs just to keep it running, Im going to park it and drive my sidekick, which im probably going to do anyway till if falls if it ever does. No offence ment to anyone just my opinion and my 2 or 3 cents worth. Hey, I could be wrong.

 

could be right too.

 

Well ULSD is bad for our pumps and injectors maybe not as bad as every one says. Sulfer in fule is what lubricates the injectors and the IP. Less sulfer less lube. I dont know If you guys are lucky or just have better standers in fule but the fule in Nv. is trash with all kinds of crud in it then you reduce the lubricity of the fule and it just adds on to that maybe it was crud that gumed up my advace maybe ULSD or both. But it is highly recomended to run some form of additive for lubrication purposes. Just my Opinion And ford mega cab is corect for the most part we don't know that the ULSD did it But I sure don't think its doing our engines any good.

The injection pump on the V macks isn't that just a P7100 bolted to an electronic advance?

On a side note heer we've had a rash of EGR 466s plugging the filter heads and now waranty doesn't want to pay to change them because the fule is what plugged it. What a bunch of idiots what are they suposed to do buy fule direct from navistar?

 

I don't know because I have never changed one nor troubleshoot it so I have not learned anything about it. It is a fly by wire system with a road speed governer and it looks like a control unit bolted to the back of a large injection pump with probably 6 or 7 wires that goes to the v-mack computer. Sorry but I can check my manual when I go back to work sunday.

Also back on the fuel issue, I have also noticed that we are plugging fuel filters up left and right. Some of the tractors don't go 20,000 miles before I have to change them again which is far more frequent than in the past. I don't know if its trashy fuel or the ulsd.

 

I think ULSD is also more prone to the growth of algee if left in storage tanks too long but not sure about that. I'll try to look it up.

 

actually sulfer isnt a lubricant, it is a binder for the lubricants in the fuel. i.e it keeps the lubricants from dropping out. most of the fuel suppliers in my area are adding additives into the fuel before they sell it to the merchants(alot of them are actually adding biodiesel, at least thats what the co-op has told me,perhaps this is why we are having trouble with leaky seals and orings?) fleet farm now has a thing right on the pump that actually mixes additives as they are being dispenced. i think the initial problem phase is starting to come to a end. most of the fuel related probs i think are caused by poor refining in an attempt to up production rather than the fuel blend. if you are worried about lubricity just add 2 cycle oil to the fuel. a little goes a long way and studies have shown it to be the best in terms of a lubricity increaser. its cheap too(especially if you buy it from wal-mart in the gallon jugs)

 

well, we have 15 old diesel trucks without any fancy electronics on them, and none have had any problems whatsoever from running ULSD.
and i am talking over 150k miles on each of them in the past 18 months since we started using it.
i personally think this is just a B.S. story to get people to by additives.

 

My thoughts are there were problems in the beginning, but now they are getting the addative package tuned in.

At the local injection services, IP and injector failures are way down from what they were when ULSD was first introduced.