06 vs 07 Duramax

[05CrewZ71]

We didnt really put men on the moon it was done in a holleywood studio and there was 2 shooters in the grassy knoll! however I wish I had a diesel more bang for your buck and so much easier to get more hp! though e85 is a idea in the right direction towards a solution! How about those 2 hippie kids on tv that drove the van across the US using old resturant grease or we could all put a food processor on our engine and hope for the same results and marty in back to the future ha ha ha

[Frankenbiker]

The big deal about sulfur in 2007-spec diesel has nothing to do with lubricity.

Sulfur in diesel KILLS the aftertreatment devices used in 2007-compliant engines. As little as one tankful of 500-ppm (LSD) will completely ruin them (but no harm to the engine itself.) It's expected that most retail fuel outlets will be selling LSD and ULSD, side-by-side at least for the first year or two, or until 2010 when ULSD will be mandated to be the only thing available.

ULSD won't harm older engines. Any change in lubricity that MIGHT have occured from the loss of sulfur content will be addressed with additives from the refiner, long before it ever reaches a retail outlet.

(I've got a bigger stake in this issue than most of the folks hanging around here... I burn 1500-2000 gallons a month, as an Owner/Operator; as such, I really feel no pity for someone who's moaning about filling his 34 gallon tank once a week. )

-blaine

[dozerboy]

Originally Posted by Frankenbiker

It's expected that most retail fuel outlets will be selling LSD and ULSD, side-by-side at least for the first year or two,

No way, you may fine LSD some places but most likely not both. There not going to put aside refineries, pipe lines, or storage tanks for LSD.

[Frankenbiker]

Originally Posted by dozerboy

No way, you may fine LSD some places but most likely not both. There not going to put aside refineries, pipe lines, or storage tanks for LSD.

Actually, that's exactly what most places plan on doing; at least that's what I thought I'd read at one point this summer. Here's an online version of T/A's RoadKing Magazine's article on ULSD:

http://www.roadking.com/story.php?id=705

They mention that 80% of diesel sold must be ULSD as of 10/15/06...

-blaine

[LostBoy]

Originally Posted by dozerboy

No way, you may fine LSD some places but most likely not both. There not going to put aside refineries, pipe lines, or storage tanks for LSD.

I think the purpose in selling both would be that fuel stations have to meet the demand for ULSD, but they'll have to exhaust the current supply of LSD as well before they can go with only 1 type.

[Yamsi401]

Originally Posted by LostBoy

I think the purpose in selling both would be that fuel stations have to meet the demand for ULSD, but they'll have to exhaust the current supply of LSD as well before they can go with only 1 type.

The infrastructure is not there in established stations to do that. You'd have to add a tank and pump for the ULSD and then retire the plumbing for the LSD when the supply is exhausted.

Most stations that suport Diesel have 4 tanks on their lot - 87, 89, 91 Octane gasolines and a single Diesel tank. If the tank holds 500 gallons I'm sure they'll drain that tank dry of LSD and then start filling it with ULSD. Too bad since that tank must have some sludge in the base and draining it will end up in pumping sludge into a vehicle's tank.

[GetMore]

Actually, what they are going to be doing is filling the LSD tanks with ULSD. Because of the sulfur left in the tanks (as part of the fuel already there) the tanks will not be considered ULSD, and are therefore LSD.

After a few refills the level of sulfur in the fuel will drop to ULSD levels, and the sticker will be placed on the pump saying it is safe for 2007 vehicles.

FWIW, some of the pumps out there are already pumping ULSD, but with slightly higher sulfur levels. Who knows when (probably just before October) they will test the fuel and give it the ULSD sticker.

[dozerboy]

X2 that the long version of what I was saying. The way I understand it they have been putting ULSD in the pipe lines but the LSD contaminates it. So they can't call it ULSD until the LSD has been flushed out of the tanks and pipe lines thoroughly.