Delfin
Grand Vizier
- Joined
- Jan 20, 2010
- Messages
- 3,821
Eric, there seem to be two schools of thought on bypass filter strategy.* Well, three actually if you include those who see no value to them.* First are those like Gulf Coast who think that by changing the big by pass filter and topping up the oil you add enough additive package to keep the oil functioning as it should.* That's why they sell a filter without additives.* Second are those like Puradyn who sell a filter that includes a slow release additive package that supposedly keeps the additives at optimum levels.* One function of the additives is to cause the carbon bits to stick together (agglomerate) so they can be picked up by the OEM filter, which usually will let pass anything less than 15 microns.* Bypass filters have a much larger total surface area that filter down to a micron or so, and are plumbed with the inlet to the filter to the pressure side, and the outlet to the oil pan.* On Delfin, the size unit I have filters at about 6 gallons an hour, whereas the OEM filter has the full flow of oil going through it at all times.
Just to be perverse, I have the Puradyn, but use the filter they make without additives because it is cheaper, and I spend the difference on oil analysis.* In any case, I'm only extending the change interval while having the assurance that whether new or not, the oil has very, very few particles in it large enough to cause wear.
I'm not sure whether Gulf Coast uses paper towels, but the TP version was and still is made by Frantz.* Or at least I think it is.
Alternatives are spin filters, which are used on most industrial sized engines, with an interesting and very cheap model being manufactured in India, the name of which I can't remember.*
The argument against bypass filters is an argument against clean oil, whatever your philosophy on change frequency is.* At least IMHO.
Just to be perverse, I have the Puradyn, but use the filter they make without additives because it is cheaper, and I spend the difference on oil analysis.* In any case, I'm only extending the change interval while having the assurance that whether new or not, the oil has very, very few particles in it large enough to cause wear.
I'm not sure whether Gulf Coast uses paper towels, but the TP version was and still is made by Frantz.* Or at least I think it is.
Alternatives are spin filters, which are used on most industrial sized engines, with an interesting and very cheap model being manufactured in India, the name of which I can't remember.*
The argument against bypass filters is an argument against clean oil, whatever your philosophy on change frequency is.* At least IMHO.