I've got an opportunity to get either of these kits that were previously used, but in good condition. The Amsoil kit is a little cheaper than the FS2500, but I'm more interested in the long-term benefit of each.

So, which way should I go? I'm leaning more towards the FS2500, but I'm looking for input, pros/cons, from people who have used both.

 

I think they are both similar in effectiveness. I think cost and availability are the difference. I'm not familiar with where you get the FS or it's replacement fiters. How often do you have to change that one and how much are they? The amsoil can be left on for two oil changes. The purpose of the bypass is to extend your intervals so hopefully you'll be going 15-20k on an interval so the filter will last you 30-40.
I can get you a replacement cost on the amsoil filter if you like.

Just a couple things to keep in mind.

 

That's been one of the factors I've been evaluating. The Amsoil filter is $40+ each filter change. The FS2500 is $26 each filter change. I think they get changed out at similar intervals.

The FS2500 gets a new filter every 10,000 miles. According to the rep, the average is 30,000 miles per oil change. With the FS2500 you don't need to change the primary filter until the oil has reached its serviceable life. I don't intend on using it in this manner. I will most likely change the oil at 10,000 mile intervals, when the FS2500 needs a new filter.

I like the FS2500 setup ... it's very clean and the filter is well protected underneath the truck. The Amsoil hangs down a tad, behind the transfer case and doesn't seem to have the same protection.

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Well, I've decided on the FS2500.

Seems like everything I have read puts it a smidge ahead of all the other bypass setups. I'll let you know how it turns out.

 

There is more than enough info that shows OCI at 10k are at the limits for these motors. Stop selling snake oil and just sell Amzoil.

 

I tend to agree ... too funny!

Plans changed! Looks like it'll be the Amsoil, since the kit is complete and ready to go. Too much running around and double the dollars to get the FS2500 system together ... oh well!

Quick question, if anyone can tell me; can I run the same Amsoil filter for two or three oil/primary filter changes, if I'm changing oil every 7500 miles?

 

AMSOIL says you should change the filter every OTHER primary oil filter change, but it's kinda up to you. These filters can run various intervals depending on use. In the semis, they can run up to 60k. In these trucks, as I mentioned earlier, you could run it up to 30-40, but if changing every 7500, then I might stop at 3x or 22500 or so.
You won't cause any problems if you go to far, the flow will just decrease. It doesn't affect how the oil flows to your primary.

 

Does Amsoil consider an oil change being done when your oil analysis determines it's time? So, hypothetically, if at 15,000 miles my oil analysis says it's time to change, then I can do an oil change and run the same Amsoil filter until my oil analysis says it's time again ... maybe another 15K?

I'm not wanting to use the system that way. Obviously, I'm not going to invest this money and change oil every 3k, but maybe double that. I just want to maintain a clean source of oil, so that I don't have injector issues down the road.

Who else is running an Amsoil system in this way? What has been your experience, as far as bypass filter longevity?

 

I don't caste what anbody says about bypass filters on the 6.0 there has been tons of.oil anlist done with and without bypass filters and they did not help extend the oil life the 6.0 is bad for shering and most oil raven good synthetic are only good to about 5-7 k. The main reason people use the bypass filter on the 6.o is not for longer oil changes but to keep the oil cleaner to keep the fuel injectors healthy. Anyways I lime the ams oil filters because they are easer to get and if you get in a binv you can just use a oil filter off a dodge to replace it.

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I change my oil every 5k and I change the bypass filter every 3rd oil change so every 15k

 

Thanks, Ranger, that's what I intend on doing with mine.

 

The oil filter has to be change because it is what takes out the crap from the oil, AMSOIL says that you can use their oil for up to 16,000 miles but you must change the oil fitler! At least the is what I was told!

BAD