How often do you really need to service engines?

[Its_Only_Money]

Cheers Chris, must be old info related to mineral stuff then.

Must say current cars oil is piddly thin when in goes IN so hard to tell if it gets worse before it comes out! Interestingly the engine has two oil filters, centrifugal spinning thing changed every 12,000 and normal spin-on changed every 36,000 - although I do both together every 12,000 to be safe. Can still hear the spinning one spinning down after exiting car, locking up and walking to the house so must be up at a decent speed!

 

[Dave_Snelson]

Never mind the commercial Joe, that is jolly interesting stuff.

I know you aren't the techie guru here, but am I right in guessing that the analysis will be looking for molecular breakdown of the oil, not just for the amount of "dirt" in it?

In terms of mechanics, I was always brought up to believe that the molecules used in modern oils (styrene-butadiene co-polymers, I think) are gradually broken down by heat and pressure - but maybe, provided you keep the crap out of the oil, it will last for much longer than the oil company would like it to last (thats me being cynical).

My personal view is that if you can successfully extract the particulates out of oil, especially on engines in near constant use, then the duty cycle of the oil will be greatly extended (as your product seems to achieve).

 

[JoeV]

You are right, I am no guru on this. Clearly, in extreme situations oil can get damaged (burnt) but this is less of an issue in marine engines which generally are not pushed to their full rating.

Puradyn believe that oil doesn't go "bad", it just gets too dirty. They have an example on their web site of a large truck engine which ran for 600,000 with their systme and so without an oil change, and then it was sent back to the manufacturer for a full inspection. I believe the manufacturer said the engine had the equivalent of 50,000 miles of wear, and that it showed no problems.

There are many school busses (you know the yellow ones) in Miami which have run using this system for over five years. And it is pretty hot in Miami, and they are in constant use, so I am sure they have been well hammered. As far as I know, they continue to see value in the product.

Purdayn's systems are not spinners (which use up a LOT of energy), they are filters, and they actually make the oil cleaner than it was when it came out of the tin. While die-hard Puradyn fanatics believe that the oil CAN last forever, Puradyn's official line is that it dramatically extends the oil change interval. I think their web site is quite good on the technical aspects of the product, and as I mentioned earlier, there are some independant reseacrh studies on it.