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I just was pre-empting the inevitible joust!
You learn too quickly on coping skills
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I do have to quesiton where the ROI would be?
There wouldn't be one, most likely. I too doubt that the capital acquisition could be outpaced with avoided costs. The current Amsoil setup is really about as cheap as one can get from an aftermarket spin-on setup. You can get the Baldwin (WIX has them too) bypass filters, but they're not typically OTC filters and will also have their acquisition costs and limited longevity in service.
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I suppose if this were set up on some huge sump, the cost could likely be reasonably paid down. But if he's got this idea of plumbing it up on a Celica or Taurus or such with a 5 qrt sump, he's almost adding 50% of the capacity by adding multi filters and plumbing.
2004.5 Dodge Ram 2500 CTD Smarty Gauges Amsoil Bypass JD Plus 50
Without bypass filtration he's at 6months by OEM recommendation. It takes a while, but eventually the owners realize that it's 6months. It's 6months under severe with 7500 miles being the limit ..or it's 6months with 15k being the limit. Essentially 6 months under all conditions unless you're truly using this as a commercial vehicle full time. It's 6 months if you're some maintenance man who never leaves the plant parking lot.
So to more or less make it pay, and that may only be in terms of service points, he's going to have to breach that 6 month time span either in the mileage in excess of 7500 if his service is severe ..or 15k if his service is not.
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Finally, I'll bet a dollar that he still OCIs before the oil is "worn out" because people like this just have to tinker; it's their nature. There is NOTHING wrong with that. Except that it ruins the ONLY goal; that of saving money by extending OCIs. After all, his first comment in his post was one of cost:
" ... works great but it is very expensive. I was looking at a frantz as an economical and maybe even more effective solution." That tells me he wants to save money, but is probably not even utilizing his Amsoil sysetm to it's full capability. There are only two reasons an Amsoil system (or any system for that matter) is not paying off:
1) there is a performance issue where used oil analysis are dictating OCIs more often than can be sustained by the ROI
2) the person is a compulsive oil changer, and cannot resist the call of the wrench
You may be right. We all tend to want to waste as efficiently as possible. It allows us more excess for the effort. I run into this in my household. I'm constantly streamlining and contouring usage profiles for the least expensive way of maintaining the status quo. Plugging economic leaks, if you will. Without fail, a 5th Column movement slams a torpedo into the side of my delicately trimmed Titanic.
..but how can one not plug leaks
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Yet somehow I'm supposed to believe he'll get his money from this double-bypass system? I think not.
I think not too. I do think that his tp roll will last longer than it normally would. That's just a reasoned assumption. I've never put it into practice - YET.
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I would have great respect for someone that says "I'm a player at heart. I cannot help myself. This goofing in the garage keeps me from the wine and women. It's foolish and the ROI isn't there, but it's cheaper than a divorce." Now THAT'S honesty.
Well, we're men ..hunters ..conquerors. Knights in shining armor. If we don't have dragons to slay ..we'll go and find some.
There was a European study that a fellow member shared with me. It would be exactly what you're looking for. It used 3 Motor Guards in parallel on a commercial Euro equivalent to a straight medium duty truck. Probably in the 5 ton range. The costs were higher than the USA due to the importation of proper sized tp. The labor rates were included too. They sold the rigs @ 8 years. The savings, mainly due to wages and very high material costs, was equivalent to about $90 difference over the 8 year period as opposed to just doing the OEM recommended interval.
The volume of oil saved was some incredible amount (like hundreds of gallons), but since it offered no substantial economic advantage AND required more down time and man hours, was rejected as viable.
I wish I had that document to share with you.