Thread: BP ultimate diesel

Originally Posted by 2 rocks

I bought my 1988 (yes 1988) grey import Pajero with a mere 17,500 kms on it from new, 4 years ago...within 6 months the pump was leaking (shock - it was getting used)...after a bit of research it was clear that the old seals were not dealing with the new-ish ULSD.
A pump rebuild with viton seals and it never missed a beat after that. Even drank Bio without a hitch...but no computer or sensors to worry about, lol!
Mike

Being such low mileage for its age, maybe the seals became dry from lack of use or just age. I once bought a bike with unbelievably low mileage and the seals were dry and the front cylinder had a rust mark in the bore where it had been sitting. It turned out the low mileage was not the great thing I thought.

Jeff

Sulphur isn't and never was a lubricant.
The problem is that removing the sulphur also removes the aromatic compounds that are the lubricants needed for rotary style VE pumps and injectors.
The govt mandates a minimum lubricity level for diesel (can't recall off the top of my head) so the oil/fuel companies add lubricant back at the refinery to meet this spec.
Whether this is enough is open to conjecture, and so some of us add a bit more for peace of mind.

Any pump made/re-built in the last ten years should be using Viton seals and so shouldn't have a problem with leaks and ULSD except when the seals/O rings are buggered.

Personally now I only fill up with BP diesel. Never had any problems with it and I get better consumption than I did before. I used to fill up at the local guy who was cheap and used to get irregular consumption figures (around 11-12l/100km), but now on the BP diesel I consistently get below 10.5l/100km.

Angus

i prefer the BP diesel aswell and have been using it for ages, i have only noticed the leak over the last week or so, but as i said it only seems to happen after the car has been sitting for a while, over a couple of days. Once i start it, it dribbles a little and then doesnt do it after that. I cant work out where its coming from either.

Never had any issues with bp ultimate though i have had a problem with bio diesel blend from freedom. I had only replaced fuel lift pump 20 000k's before and started to use bio and one month later it started to leak. Have replaced again and will not use bio again until it is been proven a bit more.

Originally Posted by Jeff

Being such low mileage for its age, maybe the seals became dry from lack of use or just age. I once bought a bike with unbelievably low mileage and the seals were dry and the front cylinder had a rust mark in the bore where it had been sitting. It turned out the low mileage was not the great thing I thought.

Jeff

Jeff
I definately agree, happened after its first 1000km trip - no surprise there! But has been perfect ever since...fortunate really as I sold it to a mate...so he's still my mate!

Cheers
Mike