Amsoil filters are made by Wix. We talked to a wix rep and we started getting a napa filter that is made by wix (I dont know the number off hand) but the rep said they come off the same line as the Amsoil ones...

 

ok, I will double check the on filters, and get back to you on that ,but the double bypass filter is a great system, and it works well, and installs and mounts fairly easy,and has a bleeder valve to allow you get oil samples when you need them for testing ,I also just took delivery of a external tranmission filter system from diesel site ,I will let you know how that turns out also I also use amsoil in my transmission as well .

 

I to would like to use amsoil 15-40 here in california. Its hard to fine. Has anybody used the cat magnet system that goes around the filter. Its reuseable each time and keeps all metals out of the engine.

 

Keep in mind that his Cummins does not have the high-shearing HEUI fuel system that we have on our trucks!

You will not convince me that 50,000 mile change intervals are possible on the Amsoil product line... not in OUR trucks, anyway. I say that from personal experience.

I started running the Amsoil DEO 5w40 full synthetic when I purchased my truck, and I ran it in conjunction with a 2 micron oil bypass system. At a quick sample/test at the 8K mark, everything looked lovely. However, by the time I hit 13,000 miles on the oil, the viscosity was already shearing down to a 30-weight oil and wear metals were beginning to show up.

I had always had good success with Amsoil in my '85 F150 with the I-300 in it, so I was sorely disappointed in the lack of durability in comparison to the advertised claims.

As an additional point of context for my own experience, I do not race my truck, I don't run it hard, I don't tow or pull anything, I don't go off-road at all (unless I miss my driveway a little bit when I pull in at night), so for my own lightly used truck to shear down the oil at half the advertised run life, I don't see any way in the world how you can expect to ever even hope to see a 50K change interval.

Let me suggest this one, too, just for a sanity check and your own peace of mind...

When you get the OA's run, at least the first couple of times, split the sample between Amsoil and Blackstone so you can have two different labs looking at the same oil. The money you save on "free" oil will more than cover the cost of an extra test. When you get your results, you'll not only have Amsoil's lab telling you what you can do with the oil, you'll also have an uninterested third party lab speaking to the same thing. That way, you won't have to worry about any "fox guarding the hen house" issues... unless the two labs do not come up with similar results.

One final "watch out for this" comment regarding TBN numbers. There are two different methods for testing TBN, and one of them is a more accurate determination for "effective" TBN than the other. Below is a blurb from a 2002 artcile related to this issue which explains it in better detail.

 

I guess you can count me as one of the few that wouldn't use Amsoil even if it was free. I wouldn't even use it if you paid me.
Regardless Pete is right, it's stupid to run oil for that long even with a super duper quadruple triple filtered bypass.

 

Ditto. However I probably would use it if free, just wouldn't ever consider buying it. I put in the same catagory as Banks Power products. Do they make a decent product, yes. Is it worth the premium? Hell no. I refuse to buy any multi-level-marketing product. You are simply paying for the marketing. And I don't care what amsoil says, I've seen Amway sales pitches trying to convince me their cleaners and crap are "better" than the windex or degreaser I'm already using. I just don't buy it. Now, if you are getting the stuff for free, can't argue with that. I wouldn't expect miracles, and wouldn't ever think about going that long on one oil change, but to each their own.

 

I will be trying that or some other synthetic soon. My ole girl has a hard time starting when its 25 degrees outside

 

The problem i have with it doesn't stop at the shady marketing scheme. When i read something on a bottle of oil and one says ok to use for xx spec and the other says tested, approved, meets xx spec i know what im going to use. There's a big difference between ok to use, and approved, meets spec. But that's already been hashed out so many times. I don't have a brand loyalty, i buy based on spec and how well it works for me, amsoil provides neither for me.

 

I will keep on using Blackstone for my OA and see what they say about extended oil changes. Just thought that it has to be better then the delo I've been using for years since the amsoil is fully synthetic. You guys are right about 50000 mile changes, I don't think I would go that long either. But it's FREE and can't complain right.

 

Free is definitely good, Chris, and I would agree that the Amsoil is better than the Delo without a doubt. Even though Blackstone does a good analysis, I think their techs are sometimes a little jumpy on their assessment of your results and sometimes a little knee-jerky on recommendations. I do still have confidence in their analysis techniques, though.

 

well I have used blackstone before ,and found ther analysis to be right on the money, back in 2003 I tested the oil in my mustang, just before I was going to run it at a open track event at pocono raceway, with the pda, they advised me that the engine was in need of repair, and that the oil showed that the metal content was high ,and that the type of metals that showed up in the oil were exsesive for the engine, and that a closer look was warrented, and that I shouldn't run the car anymore, until I found out what was going on ,well I didnt listen to them ,I wanted to just finish out the season and go to watkins glen the next week ( it would have been my first time there ),then I planned to pull the motor, once the season was over ,I was hoping that the engine would hold long enough to finish the season, but on the second day in the moring on my first run of the day, on the north course after my warm up lap at pocono, my engine blew up at about 3,000 rpm , spinning the bearings and spliting the crank in 3 pieces ,the damper pully came flying off, breaking the water pump, and then sending the flex fan I had on it into the radiatior ,chewing up like a cusinart blender, parts when flying everywere in the engine bay, also taking out the the timing chain cover, the timing chain of course, and the oil pan itself ,the main caps broke lose, and the studs from the main caps punched holes threw the pan and the pan was twisted out of shape! ,and when the damper pully fell out under the car ,the car rolled over it, and it cut my left rear tire ,and I was doing about 70 mph and againist the wall, at the time, in turn one on the high bank and againist the wall there ,I didn't listen to the report ,and if I did, and stayed home and had the engine reringed and bearinged and rebuilt and instead of racing it at the track it would have saved me thousands of dollars in a new engine ,but you live and learn, and so I will be going back next year for the first time since I blew my motor .

 

Chris since its free just change your oil every 5000 miles . I will just have to stick with my Delo unless you can send some Amsoil this way LOL ...

 

Don't know if it's free forever or just a one time thing,I should ask him though.

 

F250 the deo5w40 is not as good as the series 3000 5w30 or the diesel marine 15w40, i have been running amsoil for 8 years in my truck with a bypass, the only thing that's not amsoil is the trans fluid, when i changed to the stallion torque converter i put in schaeffer's, before that it was amsoil.

 

Ran Amsoil with their bypass filtration system in my 7.3 with 25,000 mile changes and had Blackstone do the testing. Never had any issue with the oil being ready to replace before 25,000 miles in the 150,000 I racked up. I see it from time to time and the current owner who has a landscaping business and needed it for his large dump trailer has continued with the same plan and much harder usage. Last time the truck had 300,000 on it. It does take a bit to get comfortable with leaving the oil in that long, I was really antsy the first couple of times but then it just becomes normal. Change the filters, pull the sample, top it up and run it became second nature. Never should have sold it.