I thought that you could run one standard size filter and then the other filter would have to be one of the amsoil filters but the Amsoil guy was saying that both must come from Amsoil? any thoughts ??

 

I was in the same position, and sent my bypass kit back to them. Here's why...

In researching the situation, some folks have reported that the amsoil system bypasses too much oil from the main flow into the engine, thereby creating as much as a 3-6 PSI drop in oil pressure. The amount of pressure drop experienced depends on the distance that the remote filter is mounted from the engine. I verified all of this with the amsoil tech folks. in fact, they are the ones who gave me the 3-6 psi drop number.

Furthermore, A's literature states that the remote unit is designed to pull 10% of the oil flow through their second filter. Comparably, the OilGuard units only pull 5% of the oil flow, which will end up resulting in less potential pressure drop into the engine by comparison. Their (OG's) units have also been tested by an outside lab for filtration efficiency, and they either match or beat the A filters.

Personally, I want my engine to see all the oil pressure it can. The effective difference between a 5% slip stream and a 10% slip stream simply results in a little longer lag time between complete oil cycling through the fine filter. I can't believe that that longer time to complete a full cycle creates any real lowering of perforrmance for the OilGuard units, and I get to keep higher main oil pressure (therefore, more flow) to the engine in the meantime.

I'm sure that you'll hear from several others on this as well. I would send the "A" unit back, though.

 

I won't use an Amsoil bypass system because i have heard that it filters SO WELL, that it actually filters the good additives right out of the oil, making the oil wear out alot sooner than normal.

 

I've herad the same thing, Kris, but haven't seen any real data on it yet. However, I'm getting ready to get some real-world data on one of the "A" oils thorugh my OilGuard unit. I've posted my planned testing & analysis regimen in another thread that is running concurrently with this one, so I won't repeat the details. Here's the link, though.
https://www.ford-trucks.com/forums/5...quanity-3.html

Rest assured that I will be posting my analysis results for everyone to see how it goes.

 

AMSOIL tech stated for best filtering use the EAO filter in combination with the AMSOIL. The difference between oils is what sets them apart, I can see using a poorer grade of oil with their EAO nanofiber filters and by pass systems being an issue with filtering out the additives, though i havent heard that untill today.

 

But about the pressure drop - I asked around about the pressure drop and was told that the 5 psi would not ever be missed (and that was from the Forum here). And as for the oil wearing faster, I was told that you could go like 40k plus between changes but that sounds a little long doesn't it ??

 

I don't really know if the 5psi drop would be critical or not. From what I know about hydraulics and process flows under high temperature environments, I imagine that there are some scenarios where it could be critical. I just don't want to take a chance on that.

In terms of 40K OCI's... that sounds rather BEYOND extreme to me. I would probably have to have oil tests from multiple independent labs before I could bite off on keeping my oil running that long.

In terms of the oil "wearing faster", I believe that that is a term that arises from a combination of what amsoil advertises and what their "petroleum engineer" reports in his writeups. Apparently, there is a word on the street about some of the additives being actually filtered out by the amsoil bypass arrangement, which may or may not be true... not sure about that one, but I have seen it reported in more than one location (even though that could just be internet regurgitation from a single original reference point). Amsoil does state that some of the deo additives are not friendly with the ULSD fuels, and if the deo is used in a pre-2007 engine, extended OCI's should not be practised due to faster degradation of additives due to the higher sulfur composition in the non-ULSD fuel.

So... if you combine those two thoughts together, you get something like "wears out quicker". There may be truth to it.

Personally, I'm getting ready to try the deo, but under the extremely rigorous testing regimen that I've already made reference to. I'm going t keep my eye on it very closely. By the way, I will not be using the amsoil testing services either, but will be using a third party that doesn't sell oil to help ensure non-biased analysis.

 

f-250 newbie, what was the model number on the amsoil system that u sent back? i was looking at one for my 2006 ps, i wonder if all amsoil secondary oil filter systems suck, it sure does look easy to install from the pics i saw of one already installed on a 6.0, was your oil guard bypass system difficult to install? what does one of those cost? do u like it so far?

 

My truck has over 200K on it and I have been running Amsoil bumper to bumper for the last 100K. I have also had the Amsoil Bypass System for 100K. My truck still runs and drives like new. I send my oil out to get tested every 10K when I change my oil and it has always come back perfect.

My dad has a 95 PSD that has over 500K on it and he has been running the same system that I have with no problems. He drives a lot of highway miles so he changes his oil every 40K. His oil samples have come back perfect as well.

 

Wow. 40K miles is saying something. Does he change the filters in between that any? That is saying something!

 

Yes he changes the filters every 10K.

 

The kits I purchased were for my 7.3L PSD, and might not be the same for the 6.0 - not sure about that since I don't have a 6.0 and didn't compare them.

Amsoil Kit was "EPS-20"
OilGuard Kit was "BMK16EA"

I actually haven't isntall edthe OilGuard kit yet because I am waiting for my Fumoto drain valve to arrive so I can do everything at once (drain valve and bypass kit). That way, it will be easier to get periodic oil samples for analysis.

Hope this helps. When I start geting analysis results, I'll start another thread to let everyone know what I see.