I used the Amsoil dual bypass system on my over the road truck for 3 years. I changed the filters every 15,000 miles and sent off an oil sample. They would tell me when I needed to change my oil. I really liked it. I was also running their 3000 series oil.

 

How about the FRANTZ bypass? alot cheaper to run.

 

i have the frantz and like it was a lot cheaper and i would say just as good

 

It that the tp filter?

 

yes thats the one

 

the tp is like a black slim ball when you change it. its kind of gross to think that that was in the oil.

 

From what I have seen the FS actually can take the black soot out of the oil for a certain period of time. Even after the oils noticeably lighter. The Amsoil does not. Based on that I can not see how an the Amsoil can be filtering down to the same mic level. I would say the FS is the better system but also at a higher cost. I am glad they finally moved the oil line from the oil pan drain plug. I never liked that and alwasy felt it should go to the inspection port. I always thought the TP filter was cool as it was so simple and worked well enough.

 

The Amsoil system does filter the soot out. No system gets all the soot its impossible to do but here is the key with either system. They both filter down to 2 microns. The oil will still be black no matter what but as long as the soot particles that are larger in size (3 microns and above) are filtered out you are saving wear on your engine due to those larger particles.

I have a customer running the dual bypass on his Dmax and he called me with 1500 miles on the oil the first time he installed it and said his oil was still golden like the day he poured it from the bottle.

All I ask is do your research on both systems and then choose the one that suites your needs if your buying one. I am confident that you will choose the less expensive Amsoil system which you all get the PSN deal if you go through me.

 

You might give this one a try. I have one installed on my truck and one on my 02 Golf TDI.

I did oil analysis on both after using this filter and Rotella 5w-40 synthetic and I was good past 10K miles.

Do a search on then, lots of info.

http://www.oilguard.com/index.html

 

I run the oilguard system also. Very good results on my UOA reports. Running 11K intervals now with this system and Schaeffer's Series 7000 15W-40 ($17 per gallon). Have had it on for about 4 years & 80K miles.

One thing I would consider is the additional costs down the road. Each system has there base price, but don't forget to consider how much the filter elements will cost you down the road. Also, I would not recommend running any oil over 5K in A PSD without doing a used oil analysis report and build up some historical values - no matter what the advertisement says. As you know, PSD's are tough on oil and some setups can shear oil quicker than others.

Here's how my last UOA report looked. 8,828 miles (about 5K pullin a 31' 5th wheel), .1% soot, 0 oxidation, 4 nitration, viscosity still at a 40 weight.

 

i would go oil guard or the fs2500 I have the amsoil on both trucks and have since switched to shaeffers oil since the amsoil would not last in my trucks and I got tired paying there outragous shipping prices. If and when i switch im gonna go with the oilguard. The filters are alot less money too.

 

I have seen the amsoil dual kit on Bob's truck, you could def tell a diff in oil when we switch hpops on my truck , oil had a much cleaner look not perfect by any means but better the texture and viscosity was better as well.
give Bob at dieselsite a call or the amsoil dealer that posted above.
I am sure they can give you a better technical description of it.

iirc haulin horses2 uses an oil guard system and liked it.

 

All I can say is the oil I have seen that is on trucks with the FS2500 does stay clean ( as in no or very little black) for a long time and is not nearly the deep jet black that is normal even after a few thousands miles. It certainly is no longer looking clean but its much lighter than normal. http://www.fs2500.com/video/ByPass-DemoMed_Prog.wmv

As I see it if one system can filter out soot for a given period of time and another does not or to the same level then one system is filtering finer/better than the other. Maybe that's not the case but it would be a obvious deduction IMO.

I should have one on my truck in the next couple months and I will take pictures from an oil change and track it with mileage to see how long it takes to start to turn black and how black it gets. I run Schaffers syn for all my fluids and have the motor oil analyzed by an independent lab (using Blackstone) and change based on the reports.

I also plan on running a preluber as I have alwasy wanted to run one and test it out. I plan on trying the Amsoil version on this truck. I have to say Amsoil website needs help. The navigation is a mess. Trying to find the preluber they sell is near impossible. I had to go from an outside link to find it. Makes me wonder if they still offer it or if there were issues and they pulled it.

As I see it given the way HEUI engines use oil, it is so critical that anything and everything you can do to keep it clean and running well the longer and better the truck will run.

 

If keeping the oil from turning black gives you peace of mind, then the FS-2500 is the best choice. I approached by-pass filtration from the most bang for the $$. To each there own.

 

Tarm, No problem, wasn't trying to put you down for your way of looking at filtration. The bad thing about forums and internet communications is thyat it is easy to misinterpret someones tone.

For the O.P. you seemed receptive to other alternatives and $$ seemed to be a factor in decideing wich system you were looking at.

This was taken from OilGuards web site and goes back to 2001 time frame.

"No bypass or full-flow filter currently available,
including OilGuard’s bypass filtration system,
can effectively remove any substantial amount of
sub-micron soot from engine oil.
Any manufacturer that claims their filter can provide nominal
sub-micron filtration is simply misleading consumers."

Modern oil manufactures blend in additive packages that contain dispersants. One of the functions of a dispersant is to keep sub-micron soot particles in suspension and separated from each other.
As mileage or hours on an engine’s oil increases, additives become depleted, their ability to prevent sub-micron soot particles from bonding together decreases. Eventually sub-micron soot particles begin to bond (agglomerate) and grow in size. Once a soot particle grows to 1 micron, the OilGuard bypass filter will effectively trap it. This process is how OilGuard filters soot and helps to "control" soot at an acceptable level to support extended oil drain intervals.
Filtration aimed at removing any particle below one micron is excessive. The tightest clearance used in an engine is 3 microns, bearing and valve clearances from 8 to 35 micron, and piston clearances from 35 to 100 microns.
Claims of nominally filtering out sub-micron soot particles are impossible given current filter mediums (cotton, paper and glass). While striving for this goal may seem admirable, one must look at what damage would result if such claims were true.
Properly functioning additives suspend contaminants by encapsulating sub-micron particles. In order to filter out these sub-micron particles, the additives surrounding the particle would also have to be trapped. Trapping additives inside a filter means that the oil remaining in an engine's system will have fewer additives available to protect components thereby increasing the probability of engine damage.

Based on the above comments regarding soot I can expect my oil to get darker, maybe even black, due to the SUB-MICRON soot particles. However, these particles will be removed once they reach 1 micron and no damage will be done to the engine. The other interesting thing is that the oil flow rate with the OilGuard is 1.5 qts/min. What kind of flow rates do the other bypass filters have?

 

Tarm, No problem, wasn't trying to put you down for your way of looking at filtration. The bad thing about forums and internet communications is thyat it is easy to misinterpret someones tone.

No worries same thing I hate about the net; text never conveys properly. You either end up putting in countless smiles etc... or you explain after they mistake the intent. Thanks for letting me know. BTW that was a very through info post. I do agree that the FS2500 is $$$ Personally I think a bit overpriced. But as far as perf it seems to be very good. If not for it or if out of someone price range I too think the oilguard would be my choice and recommendation.

 

Excellent post CGMKCM.