Will the ULSD have a bad affect on the 2006 and earlier diesels? I have heard the fuel mileage will be down and the seals will start to leak.

 

Don't worry about it. The seal leaking issue is with older diesels that are using Buna rubber seals. Newer diesels use Viton seals.

MikeyB

 

The effect will be less lubrication for injectors and pumps, start using a good additive every tankful and hopefully things will be fine.

 

Diesel fuel additives are probably a good idea anyway, but I'm sure the diesel fuel industry is well aware of any issues with ULSD and will properly treat the new fuel accordingly.

 

cummins doesnt recommend additives as long as ur getting your fuel from a reputable source
they say the 06's wont hae any problem running the new ULSD fuel

 

Only trucks that might have issues with seals is the 1st generation trucks.89 thur 93 or so I've read.

 

The only station we have in my town started with the ULSD 8 weeks ago. I started to notice a lot more clatter/engine noise than I had before using the ULSD. I am at 8K right now, so I also recognize that my engine is getting broke in, but it was also getting pretty noisy. I added a mix of PS/MMO just to see if it was a fuel related, lack of lubrication issue. I can honestly say that my engine is now back to it's quiet old self. My fuel mileage also dropped with the ULSD, back now where it used to be.

Cummins might not recommend any additives, and I AM getting my fuel from a reputable source, and my truck did not have any problems running the fuel as far as idling smoothly, or having power when empty or towing - it just got real noisy from the first tankful of the stuff.

CD

 

just waite you havent heard loud yet get some miles on it and pull some loads it will get louder been trying all and everthing to quite it down. just made up my mind its a Diesel

 

Here in California the only thing you can get is ULSD. I've been running it in my truck since day one. I now have a bit over 8000 miles and all is well.

 

That's good to know. Have you been using any additives?

 

I throw in a bottle of Power Service every few tanks. I really don't notice a difference with it in or not. Maybe if I ran it for a few consecutive tanks I would, but now I don't.