After extensive searching, I am left puzzled as to why nobody uses Amsoil Synthetic 10W-30/SAE 30 Diesel Oil in their LB7? After all, can't you use 10W-30 in cold temps anyways? Is there something about this oil I should know about?

I used it on my lb7 2001,I took it out,the turbo started squeeling after 5000 miles, went back to 15/40 wt.I put it in at about 75,0000. now 120,000 mles k2500 4x4

I used it on my lb7 2001,I took it out,the turbo started squeeling after 5000 miles, went back to 15/40 wt.I put it in at about 75,0000. now 120,000 mles k2500 4x4

So I guess the SAE30 isn't the best for the Duramax. You have the 15W-40 in there now and it's alright? I may just do that.

Look In Your Book. Use What's Recomended. Do Not Give Warranty Work an Excuse to Get Out of It.

Amsoils 30w diesel oil is 5w30 Heavy duty diesel, not 10w30. Make sure you have the right oil, the 5w30 is the best oil I've ever run in any of my diesels.

Amsoils 30w diesel oil is 5w30 Heavy duty diesel, not 10w30. Make sure you have the right oil, the 5w30 is the best oil I've ever run in any of my diesels.

I know about the 5w30 HD Diesel oil from Amsoil, but there is also a 10W-30/SAE30 Diesel oil that they offer. I was just wondering if anyone uses this on their LB7 and how they like it. It can be found here: http://www.syntheticoilnlubes.com/amsoil_motor_oil_sae30.html

Must be a new product, I've never seen it before. When you ordered it did you use the first pricing list or did you scroll down to the 10w30?

Must be a new product, I've never seen it before. When you ordered it did you use the first pricing list or did you scroll down to the 10w30?

I haven't ordered the oil yet. In fact, I haven't even gotten the truck yet, I'm getting it Monday, but I figured I'd get the oil ready along with some Synthetic Tranny fluid and filters for both.

I'm an Amsoil dealer, and when I read this post I got out my catalogs to look and there is no 10W-30 diesel oil in the catalog. There is Series3000 5W-30 (which I use), synthetic SAE 30 Heavy Duty Diesel Oil, synthetic Heavy Duty Diesel 15W-40 Oil, and synthetic BLEND Gasoline and Diesel 15W-40 Oil, but NO 10W-30.
The above listed are the only oils that Amsoil recommends and rates for use in diesels.

I'm an Amsoil dealer, and when I read this post I got out my catalogs to look and there is no 10W-30 diesel oil in the catalog.

Not true at all. The ADC is formulated in a way that it meets 30W as well as 10W-30. ACD has been a very reliable diesel oil for years. Nothing wrong with running it in the Dmax. You can't hardly blame the oil for a turbo going out unless you know for sure. It might of been going to start with.

Greg

Well Greg, you may be reading somewhere other than the retail catalog and thast's all I have here at home. Mt tech spec heets are at the shop. Never read up too much on the 30W, as I've had no calls for it, Ill take a look Mon.:o:

Not true at all. The ADC is formulated in a way that it meets 30W as well as 10W-30. ACD has been a very reliable diesel oil for years. Nothing wrong with running it in the Dmax. You can't hardly blame the oil for a turbo going out unless you know for sure. It might of been going to start with.

Greg

Right! dirty old man, the SAE 30 Heavy Duty Diesel Oil is also a 10W-30. I just wanted to know if it is okay to use in the Duramax, considering its price isn't too bad at all.

DOM, the change just happened in the last few months. I noticed the new label on the the last shipment I received a shipment a few months ago. I checked the website and found the following quote:

" AMSOIL Synthetic 10W-30/SAE 30 Diesel Oil (ACD) is formulated with premium synthetic base oils that exceed both 10W-30 multi-grade and SAE 30 straight-grade viscosity requirements for outstanding performance in modern and older diesel engines. Unlike conventional SAE 30 motor oils, AMSOIL ACD has a naturally high viscosity index and does not contain paraffin (wax). It has a -36°F pour point and qualifies for SAE 10W, making it an ?all season? multi-grade lubricant with a wide operating temperature range. AMSOIL ACD is formulated without viscosity index improvers (VI). This shear stable formulation stops viscosity loss and associated bearing and cylinder bore wear. AMSOIL ACD contains premium additives with a high 12 TBN to neutralize acids from blow-by, exhaust gas recirculation (EGR) and high sulfur diesel fuels. It protects against damaging piston deposits, ring sticking and sludge."

Hope this helps.

Lynn
AMSOIL Dealer since 1981
Vicksburg, MI

Thanks for the help, Lynn. Would any of you guys consider using this oil in their Duramaxes?

Do most of you use the Amsoil SAE 15W-40 Synthetic HD Diesel and Marine Oil or do you use the SAE 15W-40 Synthetic Blend Diesel Oil?

I use the Amsoil SAE 30 diesel oil. Have used it for 40K miles, also use it in my other two rides, both 454s.

I use the Amsoil SAE 30 diesel oil. Have used it for 40K miles, also use it in my other two rides, both 454s.

Really? What do you think of it? Have you gone 40k without changing it? I would like to try it myself, but am reluctant right now.

I've used 15W40 HD full synthetic for 20 years now, meets the requirements, and usually go 15K with the dual bypass system. Not a problem in the 4 trucks, almost 200K on some of them before I traded.

Well, I gotta eat crow about the 10w-30 oil, I just hadn't looked that closely at the 30W data sheet and hadn't ever handled any of the stuff to see the changed labeling.
As I noted in another thread, my truck gets light weight use, with only very rare use pulling 7K TT. Most of the rest of it's use are short trip, stop and go around town, totally stock and rarely ever using all of that hp available stock.
So I went for the Series 3000 5W-30 HD Diesel oil, figuring on quicker oil circulation being a real asset for my own use. I also installed an Amsoil dual remote oil filter setup.
Once a year, which for my usual use is about 9K-10K miles, I take an oil sample and get lab analyzed. The first batch went to the 2nd test for 2 years use before they said change it. The tests have all come back good, except high in copper, which others here on the site say is characteristic of the D-Max.
I am especially happy that the soot level stays so low and the TBN stays high.

How about Rotella?

How about Rotella?Try using the search feature for info on Rotella, you should find plenty of reading material. BTW, welcome to the site.:)

Really? What do you think of it? Have you gone 40k without changing it? I would like to try it myself, but am reluctant right now.

I haven't done an oil change yet. It still has whatever the factory oil was, plus 1 qt of Amsoil every 10K when I change the factory filter, and a couple more for a total of around 6. My bypass filter came off my other truck when I traded it, and I didn't change the element because it was an lp engine. So my bypass has at least 100K on the element. I just sent off my first sample for analysis, I should have the results in a few days.

I haven't done an oil change yet. It still has whatever the factory oil was, plus 1 qt of Amsoil every 10K when I change the factory filter, and a couple more for a total of around 6. My bypass filter came off my other truck when I traded it, and I didn't change the element because it was an lp engine. So my bypass has at least 100K on the element. I just sent off my first sample for analysis, I should have the results in a few days.

Wow! I am thinking of doing a regular change and using the Amsoil SAE 30 and a new Amsoil filter. Why didn't you just change out the factory oil in the first place?

Why waste it? It was brand new, and I put the filter on as soon as I got the truck.

Yeah, but you have both synthetic and petroleum oils in your engine at the same time? Am I reading this wrong?

There is no problem mixing dino and synthetics. In fact, more and more evidence shows that a blend has as much protection as straight synthetic. Mine eventually will be all synthetic, because that is all I use to replace with.

I have used AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil ever since new, I installed it after 4,500 mile break in, I use it all year and can run it for 1 year before changing it, but I only have 33,000 miles on a 2002. The truck is kept in a commericial building that's heated in winter and out of the elements, I use a 4 cyl little car for every day driving, hopefully this LB7 should last well past 200,000 miles with little use.
A little comment about the Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil, a retired co-worker pulls a 32 foot Hitchiker from MPLS MN to Dallas Texas several times a year is and has been told to use the series 3000 5w-30 in his Dodge Cummins 6.0, he now has 85,000 miles and with all his pulling, the truck run's and everything checks out as good as new, wondering that with a 1 ton dually cummins pulling a 32 foot Hitchiker 5er with 3 slide outs and totally loaded and using a 5w-30 series 3000 diesel oil is incredable to me, I may be changing it to the series 3000 5w-30, I have only pulled some heavy skid loaders several times but mostly sits in garage untill needed for some work and family trips.

I have noticed when I use Rotella rather than the oil that the dealer uses my duramax makes much more noise. Why is this