PuraDYN Bypass

[Tragic]

Any thoughts on the PuraDYN bypass system?

It seems sound but then I'm not a filtration expert. I'm encouraged by the apparent fleet owner interest. I wonder about the time-released additives. All-in-all, I'm leaning towards giving this a shot. It'll be going into a diesel with 0 miles. My 2nd choice is a BMK-11 from Amsoil.

PuraDYN Sales Manual

 

[jamesn]

interesting stuff in the PDF. how much are those systems and how much are replacemnt elements? they seem to have only 1 size of the unit. they must be pretty large.

 

[Tragic]

They have a variety of sizes, as you can see here: PuraDYN Spec Page

However, they do run a tad big. And, it does seem they run expensive too. I searched e-bay yesterday and the smallest version was going for near $500. If I recall correctly, someone mentioned elsewhere on BITOG that replacement filters were $20. I think someone else thought puradyn would be the least costly in the long-run, but he didn’t give specifics. I haven’t calculated projected cost. I’ll probably be calling today or tomorrow to get additional info/prices.

 

[Bio-T]

PuraDYN bypass filter must be mounted higher than the drain because it is a gravity drain. Also the unit draws about 10 Amps continuously for the heating element.

I would continue to look at other bypass units before making a decision.

 

[Tragic]

Good point. The continuous current draw does concern me. Not sure if it's worth it.

 

[RalphPWood]

Those are good filters. Toilet paper is also a good filter. Fleet managers normally depend on sales people to tell them what they need to buy. All a filter needs to do is clean oil. There can be a small amount of glycol in new oil. If you have a glycol contamination problem from say a head gasket leak you don't need a filter that boils off the glycol. You need a new head gasket. Normal oil temperature will boil off fuel and water. You don't need additional additives in the oil. Clean oil doesn't use up additives enough to worry about. You are adding enough new oil at filter change to keep the additives up. Filters are simple but it takes a little common sense to understand them. The initial cost is no big deal. It is the cost of the elements and how well made the housing is that counts.

Ralph

 

[msparks]

The time release addtives seems like a gimic. Use a quality oil with the proper additives in it and you won't have to worry about that.

With the BMK 11 you could have the convenience of easy filter changes and the ability of mounting it either horizontal or vertical.

with a $500 intial investment it would take a lot of Amsoil filters to recoup your dollars.

I would guess cost benifit, easy of maintenence, and ease of mounting would be my biggest concerns when looking at by-pass filters.

 

[Tragic]

I think this was just released today: DOE Final Test Report

 

[spiderbypass]

Purafiner is similar to puradyne, but they are more reasonably priced, and the filter elements last longer. Puradyne seems to have more money and advertisement, where purifner seems to have a better product.Purafiner also has a heating element.

 

[LarryL]

As mentioned above, I think the 10 amp draw on the electrical system would eliminate this system from passenger car use.

Installation of bypass filters is always a problem and the installation of this filter would be more difficult than most.

Bypass filters would do better in the market if there were specific installation kits for each application, with well designed bracktets, hoses cut to length and every fitting, screw, clamp and tie downs needed.