Patrol Survey quick question

Hi Trevor,
Yes you are correct the seals would need replace on most mid 90's and older pumps. The seals on newer cars(>94) are made from FKM(Viton) and ok with low sulphur. But older Fuel systems have seals made of nitrile rubber also known as NBR or buna-n.

But a danger of high sulphur is the devastating effect on oil, i will go into more detail later but anything over 500ppm is classed as needing special attention to the TBN of the oil or more regular oil changes. There are rules of thumb which we use but i do not want to go into too much detail until we have enough info from the survey(Trolls can ruin the results).

Exactly my point,

You never had low sulphur fuel when the early models were running about. High sulphur fuel is death to oil, there are two ways to fight it. You can regularly change it or you can change to an oil with a high TBN. For example Morocco has 1000ppm and before you go over there you have to put a high TBN oil in your car. If you were not using a high TBN oil or changing it very often then a modern diesel would not last. One thing that stands out from the early failures is the lack of maintenance in the early days, with a high sulphur fuel, you can kiss that engine goodbye. But again until further info come in we cannot say this is the cause.

Opps,

that should read Morocco 10,000 ppm (1%)

so why didnt it affect prado jackaroo etc etc....

Hi Voxson,
Sorry never answered your question, got carried away with the jackaroo. My mate had one, ohh dear what heap that was, so apologies for my rant.

But to answer you question, it looks like all the big names except Nissan have held back there Hi-Tech motors. After reading every post know to man and asking certain questions which were bizzare it all seems to have fallen in place. But as i sit here my wife is giving me dagger stares, so off the computer goes. Will post my theory tomorrow.