Has anyone run full synthetic amsoil in their truck yet after breakin? I have thought about running that stuff because i hear nothing but good stuff about it in gas cars, how about diesels?

many people on this site run amsoil in their dmax's, me included. its great oil

Has anyone run full synthetic amsoil in their truck yet after breakin? I have thought about running that stuff because i hear nothing but good stuff about it in gas cars, how about diesels?


If you do a search, you will find ALOT or threads on Amsoil. It is supposed to be one of the best oils for diesel as well. Alot of guys here who run it, love the stuff.

I plan on running it for my second oil change. The dealership gave me a free first change, but on the next Ill do it myself with the Amsoil.

I've not heard anything bad yet:)

10,000 average miles before each oil change, and oil analysis comes back clean every year.

Either I am the only one that ever reported a bad story to amsoil or their dealers lie. I talk to a lot of people about amsoil and very few like it except the guys that are trying to sell the slop. I would be extremely leary about trying to dump amsoil into any of my engines again.

I run schaeffer 9000 in my truck, but amsoil has been in my harley since day one, 40,000 miles no top end work needed whereas topend work is usually needed at around 30,00 miles. Good stuff, but schaeffer got the nod for the truck. I wouldn't worry about amsoil at all.

been using amsoil for 25 years and have never had a problem. And I run it to the max milage too... JD

I switched over to Amsoil Synthetic 5w-40 cj-4 at 1000 miles. I just sent out an oil sample at 8000 for a baseline. I love the stuff, use it in just about everything. My 20 year old tractor stopped smoking with switch over to synthetic.

My 20 year old tractor stopped smoking with switch over to synthetic.


cause syn doesn't smoke when burnt.

Either I am the only one that ever reported a bad story to amsoil or their dealers lie. I talk to a lot of people about amsoil and very few like it except the guys that are trying to sell the slop. I would be extremely leary about trying to dump amsoil into any of my engines again.

Just wondering what your bad experience was? And are you sure it was the oil?
Thanks Ron :) :o: :rolleyes:

Either I am the only one that ever reported a bad story to amsoil or their dealers lie. I talk to a lot of people about amsoil and very few like it except the guys that are trying to sell the slop. I would be extremely leary about trying to dump amsoil into any of my engines again.

Just wondering what your bad experience was? And are you sure it was the oil?
Thanks Ron :) :o: :rolleyes:

Me too. Share your experience!!

Isa 55:1-3, matt 11:28-30, john 1:12 as many as recieved him (jesus) to them gave he the power to become the sons of god. Is this necessary?

I run a Amsoil bypass filter and run there full syn oil (8000 mi.) not one problem!!

I have been running Amsoil for about 10 years. Had it in my 6.5l and Now its in everything in my Dmax. I run it for about 20k between changes. I take an oil sample every time I change it and send it to the local Cat dealer it comes back every time that its good to run. If you want to see the analysis reports let me know and I can scan and email them to you.
Kevin

Ran it in all 3 duramaxes I've owned. LB7, LBZ and now LMM and never a problem out of any of my trucks.. Heath you have any idea if Amsoil is going to do a 15w-40 that is CJ-4 rated? From my understanding 5w-40 is the only that is in the line-up, correct?

They've made no mention and I would guess not. The 5W-40 pretty much covers all needs and with new specs probably changing again in few years, whatever that may be, they're probably currently working on one to meet that.

I know this is a controversial question, what is the general consensus from those of you using Amsoil about when to convert from dino with a new engine? How many miles? I've seen a lot of different numbers but what is the logic?

Basically, the theory is that a synthetic can delay the "breakin" period, ring seating, etc. I think with today's engines, it's not really a big problem anymore. I think good practice is one or two good intervals with the dino and then switch. SHould be good to go.
Just one opinion:)

I switched to Amsoil just before 5,000 miles. No issues at all. I get the same milage when it had 1500 miles on it that I do now with over 40k.
I am switching back to Delvac 1 as I have found it for a great price and feel both are great oils that will make your truck last for 500k miles

I went to 13000 till switching to Amsoil. I installed the bmk-17 remote by pass filters while I still had delvac 1300. The oil was black with 4000 miles on it. Topped it off with the 2 extra quarts it now holds and continued on with he delvac. By the end of the week the oil was a clear lighter colored black. I now have 1500 on the series 3000 5w30 with 2 new filters and its still pretty clear.
With the low annual miles I drive I can run thru to spring and change the full flow then may be change it all mid summer 08 It appears to give a 1/4 mpg improvement

I run the dual remote by-pass setup from Amsoil, have 28,000 miles on my 5w-30 HDD oil and do the analysis every 7500 miles. Have not had one problem.

I run in front to back in my truck. I had 15,500 miles on the last batch when a failed injector diluted it. The oil analysis from the local CAT dealer was good except for the fuel contamination. I actually found my injector problem before it started smoking. I run their bypass system on the truck and am in the middle of replacing all the fluids in my 72 Nova to Amsoil synthetics. I hate Amsoil's MLM sales structure, but they have a great product.

I also run it front to back in my truck. We have a JD 8400, combine 9760 and 9600 that run with amsoil. Love it.

I switched over to Amsoil Synthetic 5w-40 cj-4 at 1000 miles. I just sent out an oil sample at 8000 for a baseline. I love the stuff, use it in just about everything. My 20 year old tractor stopped smoking with switch over to synthetic.

GmcTech,

When you get your oil sample results back let us know the results. I also switched over to Amsoil Synthetic 5w-40 cj-4 with teh AMSOIL Filter at 7000 miles and was curious how long to go betweeen changes. 90% of my driving is highway.

Thanks,
Chris

Heath you have any idea if Amsoil is going to do a 15w-40 that is CJ-4 rated? From my understanding 5w-40 is the only that is in the line-up, correct?

Conklin makes a 15-40 CJ-4

http://conklin.com/products/specs/41290.spec.pdf

I'm sure the question has come up and has been answered, but....

If the DIC is saying the oil has less then optimal life left, but you're not to far into the 20k interval what gives?

The DIC does not monitor the oil itself, just a programed set time based on temps, revolution, etc. and calulates an estimated life. If running a quality oil that can go those distances, you just have to reset it midstream. Those doing analysis and going 30k probably have to reset it 2 or 3 times.

The DIC does not monitor the oil itself, just a programed set time based on temps, revolution, etc. and calulates an estimated life. If running a quality oil that can go those distances, you just have to reset it midstream. Those doing analysis and going 30k probably have to reset it 2 or 3 times.

Sounds like what I want to hear! I wasn't sure how it calculated the life span...

I am seriously contemplating the purchase of the dual bypass filters for my Dmax. I am curious how much improved the overall picture will be with this option vs just going with the oil and filter by Amsoil. I did the math earlier today and found that if you took both to the max milage of 25K on the oil/filter vs the dual bypass of 60K the dual will not pay for itself until you hit 200K. I may just go with the one filter unless I can be convinced otherwise.

I run a Amsoil bypass filter and run there full syn oil (8000 mi.) not one problem!!


I totally agree with running Amsoil with the Bypass... I run the BMK17 which is a Duramax specific kit. The Bypass filters down to 2 micorns!!! The best full flow filters get down to 15microns at best.

I use the 10w30HDD in my truck. Good luck and just know that any synthetics are superior to dino (non synthetic) oils as they don't break down as easy.

I have talked with GM Powetrain Engineers on this and synthetics show virtually no engine wear and as such they spec it on some of their best engines such as the LS2, LS7, etc.

It's better to have it and not need it, than to need it and not have it! X2 for Amsoil bypass filter and racor secondary fuel filter. If you think you can go 500K with dino, you will go 1 million with synthetic and extra filtration. Just my $.02

I keep my trucks for a long time but I think I may not want to drive the same truck for 1M... Unless of course the new ones are crap!

I keep my trucks for a long time but I think I may not want to drive the same truck for 1M... Unless of course the new ones are crap!
Shoot, I’ll have to have a million on this one before I’ll be able to afford another one. Ok, that may be a little off but it’ll be at least 700,000miles before I’ll get another, unless something catastrophic happens.

The price tag on these diesels is definitely get up there. About the price of some houses!

are there many to choose from my truck creeping up on 5000 miles is it just 5/40 what is the cj-4 mean. mobil 1 and amsoil seem to be the favorite what do you guys think of mobil 1
thanks

The CJ-4 is the API(american petroleum institute) rating of the oil. These change over time as specs change. It's the newest classification of diesel oil and is to be run in pretty much 07 and newer. There are exceptions, the 07 classic for example.

The CJ-4 is the API(american petroleum institute) rating of the oil. These change over time as specs change. It's the newest classification of diesel oil and is to be run in pretty much 07 and newer. There are exceptions, the 07 classic for example.


If you have a truck with the DPF (new trucks with particulate filter) you have to run CJ-4.

CI-4 from my understanding has better wear protection than the CJ-4 and if you don't have a DPF you can run it in your truck.

Correct, I believe the DPF's are only on 07's and newer??
Actually the CJ-4's are an improved formulation in all areas except the TBN levels.

Correct, I believe the DPF's are only on 07's and newer??
Actually the CJ-4's are an improved formulation in all areas except the TBN levels.


So bottom line is unless you got an 07 stay away from CJ-4 because it does not have all the good stuff (additives) to make it last and do extended oil drail intervals...???

No, sorry if I relayed that message. CJ-4 is the best in additives, except TBN additives. If I were going to change oil every 10k or less, I'd probably run it, as it's a better oil. I have a very nice graphic that shows this, but I can't copy the darn thing to post it:(

No, sorry if I relayed that message. CJ-4 is the best in additives, except TBN additives. If I were going to change oil every 10k or less, I'd probably run it, as it's a better oil. I have a very nice graphic that shows this, but I can't copy the darn thing to post it:(

Heath, No need to apologize Im just trying to piece it all together. If I am going to run Amsoil synthetic I want that oil to hold up for more than the regular oil change interval of CJ-4. Thats why I run Amsoil AME 15W-40. I feel bad for the guys that dont have that option... Hopefully Amsoil is workin an a new blend for extended drain intervals for an 07 or newer.

I'll be interested to see how it holds up and hopefully some of those using will do analysis and post so we can see how it is performing.

AMSOIL Synthetic 5W-40 Premium Diesel Oil (DEO)
AMSOIL Synthetic 5W-40 Premium Diesel Oil (DEO) is the premium choice diesel oil for model year 2007 and newer heavy-duty and pickup truck diesel engines requiring API CJ-4 emission quality oil standards.

AMSOIL Synthetic 5W-40 Premium Diesel Oil replaces 5W-40, 10W-40 and 15W-40 viscosity oils. It is “backwards compatible” with pre-2007 diesel engines and recommended for newer and older diesel and gasoline engines and other applications requiring the following worldwide specifications:

http://www.amsoil.com/StoreFront/images/deo_qt_350pxh.jpg

Pa32rt,
Not sure what you are trying to say but maybe this will help...?


SERVICE LIFE
AMSOIL Synthetic 5W-40 DEO Premium Diesel Oil is recommended for use according to the longest service interval established by the engine, vehicle or equipment manufacturer. Drain intervals may be extended when monitored by oil analysis.
AMSOIL Ea™ and Donaldson Endurance™ full flow oil filters are designed for extended drain intervals. They stop smaller particles, have less restriction and last longer than regular filters. For best performance use AMSOIL Ea™ or Donaldson Endurance™ oil filters.


SERVICE LIFE
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil AME is recommended for extended drain intervals in unmodified(1), mechanically sound(2) vehicles or equipment as follows:
Personal Light Truck Diesel Engine Service
• Normal Service(3) -- Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
• Severe Service(4) -- Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.
• Replace AMSOIL Ea™ full flow oil filter at the time of oil change up to 25,000 miles (other brands at standard OEM* intervals).

I thought you were saying you hoped AMSOIL came out with an oil for '07 and newer. It looked like that's what it is. Isn't it?

The 5W-40 is for the 07 and newer.

It was actually this quote:

Heath, No need to apologize Im just trying to piece it all together. If I am going to run Amsoil synthetic I want that oil to hold up for more than the regular oil change interval of CJ-4. Thats why I run Amsoil AME 15W-40. I feel bad for the guys that dont have that option... Hopefully Amsoil is workin an a new blend for extended drain intervals for an 07 or newer.

No, sorry if I relayed that message. CJ-4 is the best in additives, except TBN additives. If I were going to change oil every 10k or less, I'd probably run it, as it's a better oil. I have a very nice graphic that shows this, but I can't copy the darn thing to post it:(


If CJ-4 is the best why has everyone steered me towards the older Ci-4 for my LBZ including an Amsoil dealer where I have bought my Bypass and oil from? I am running the 10w30HDD. By the way what is TBN? What is the BEST Amsoil oil to use in the LBZs in yor opinion and why?

Thanks in advance....

Honestly you can't go wrong either way. All the oils are very good. The CJ-4 is a more robust oil to meet the higher quality specs and would be my choice if I want the best protection I could get. But the EPA stepped in this time and regulated the amount of SAPS that could be used. This is the additive used to determine the TBN of the oil, total base number. Most diesel oils are at 10-12 in the bottle. It determines how much acid fighting abiltity the oil has. With the EPA regs, the highest level now allowed in CJ-4 oils is 8.1, so it won't last as long as the older oils. So it boils down to how are you going to use it. If wanting to go long intervals based on analysis, I'd use the older ones. If If was going to change my oil every 7500-10000 no matter what, I'd use the CJ-4.
Hope that clears it a little:)

What oil filter do you recommend for my new 2007 Duramax Diesel?

Thanks.

amsoil eao 52

It is also my understanding that CJ-4 is devoid of ingredients that would harm the DPF. At the end of the day I like 10W or 15W oil. Somehow, someway there is likely a tradeoff in removing the stuff that is bad for the DPF versus oil life. Nothing is free! I do remember that the Amsoil site had some kind of write-up on CJ-4. Go and check it out!

Will Amsoil discontinue the 15w40 12TBN CI-4 oil after a while? I hope not. Will there ever be a 15w40 CJ-4 oil? Will there be an increase in oil consumption switching from 15w40 to 5w40? Thanks guys.

At the last meeting I was at, they hinted that the CI-4+ oils will probably be phased out some time in the future. One of two things could happen. Since the EPA mandated the rules that caused the lower TBN, they may decide someday that since the new oil is backwards compatible, we could rid of the older oil. Hope and don't think that would happen.
The other thing is as 07 and newer grow in numbers, market share for the CI-4's will decrease over time and a decision will need to be made whether it is cost effective to produce at some point.
Not sure about a new 15W40 being made. Here again, the 5W-40 can be used in place of the 15W-40 and was they way to go at this point as the API specs could change again in 2010?? Then we are looking at a new oil again.
As for consuption, shouldn't be any unless you are already using some, then in my experience, yes, there could be a little more??
I had a truck that used a little and switched to the 5W-30 one winter. Sure started better, but it did use a little more.
Hope that gives a little insight.
Heath

Thanks Heath, my truck uses very little, so it should be fine if that day ever comes.