Thats funny surfram. I ran Rotella for years and LOVED it. There all good. lol

 

AMSOIL saved my marriage, eliminated my need for Viagra AND improved my fuel economy 100%!

Ain't MLM great!

 

Crack me up.

 

great thread, lots of real time experience but not even one mention of Mobil 1 Synthetic 5W40 Turbo diesel truck? API 4 yada yada yada bla bla bla etc.

 

Someone should give Mobil 1 a try. Would love hear start more rumors and trash talking. lol. Oil and politics. Hand & Hand.

 

I put a bunch of miles on RP 15w40 with an Oilgaurd bypass years ago and I used to compare UOAs on Bobs site and mine was second to none. I firmly believe that every machine is different and if you find something that works good , might as well stay with it. But I stopped using the RP 15w40 cuz it was hard to find in Phx. but now it's easier - I've noticed Checker, Pepboys etc has it now. I've been using Shaeffer 7000 but haven't done UOA yet. I might go back to RP 15w40, yet. I've tried several brands of synchromesh and diff lubes (with UOAs) and I will go FAR out of my way for those RP products. Craig

 

Well, I'm not gonna argue with you, as I am sure that the original poster did not want this to turn into this. I will tell you that I did talk to Amsoil last week, and if you look at the white paper itself, REGARDLESS of where the test was done, it had to confirm to the ASTM and SAE testing standards, so how are they going to cheat on those tests? Sure, they can word the lube paper to lean toward a certain product, but there are plenty of other companies out there that do it, and the actual numbers are factual on the products. Maybe I'm biased because I've blown up a rear end on RP, and haven't had anything but great luck with Amsoil.
Anyway.. Enough with the arguing, run what ya want
Scott

 

I don't really understand where the way the product is marketed comes in here? If it works, and its a good product, does it really matter how its marketed?
Scott

 

Guys, if you run conventional oil, you can add it to the tank after you change your oil. I love changing my oil, 1 free gallon for my next three fillups!

Rotella, Delo, ValueTech Walmart, it all lubes enough to sustain the mighty cummins!

Even Fram, fall apart filters can sustain the cummins 99% of the time.

 

Mobil 1


Meets CJ-4, CI-4, and CH-4
Is recommended for diesel-powered pickup trucks built by Ford, General Motors, GMC and Dodge.
Meets diesel engine requirements of Cummins, Powerstroke, Duramax and Navistar.


Mobil 1 Turbo Diesel Truck 5W-40

SAE Grade 5W-40
Viscosity, ASTM D 445
cSt @ 40ºC 100.4
cSt @ 100ºC 14.9
Viscosity Index, ASTM D 2270 155
Phosporous 0.12
HTHS Viscosity, mPa•s @ 150ºC ASTM D 4683 3.9
Sulfated Ash, wt%, ASTM D 874 1.0
Total Base #, mg KOH/g, ASTM D 2896 10.7
MRV @ -35 º c 25400
Flash Point, ºC, ASTM D 92 235
Density @ 15ºC kg/l, ASTM D 4052 0.85

 

I'd feel plenty comfortable running either Amsoil or RP in my engine. Both companies have well deserved reputations for quality products. Marketing might be a different story....


Anyhow, the poster who alluded to the "commodity" element of synthetic oils is pretty much on the money. It's like corn-- corn is corn. Synthetics are synthetics. All the people going blue in the face trading "evidence" of one products superior performance over another are wasting their time.

Besides, we all know that Redline is the best Or was it Mobil? Or PB Extreme? Gee, I keep forgetting.

jh

 

I just changed my oil in my rig and put in Rotella synthetic. Any thoughts on this? I have been using the same thing in my wifes Volkswagen Diesel and it seams to work well. Mobil 1, Amsoil, and Royal Purple are considerably more expensive. Is this other stuff that much better?

 

Well in a way yes.Once again the Rotella is a group THREE oil.The others you mentioned are Group Fours and in a different class/price.

 

Man this thread went in the wrong direction. Oh well. Here is what I will do. I will post info that Amsoil and Royal Purple both emailed me. I will post it on Monday. This info talks about thier test and what they found about their own oils under certain conditons and so on. There is pretty neat stuff with both. This thread got carried away, because I mentioned the bad mouthing Amsoil was doing. After recieving both emails from Amsoil and RP, just out of the blue with another email Amsoil sent me, Amsoil started bad mouthing RP. RP didn't say anything at all AT FIRST about Amsoil untill I mentioned what Amsoil said about them. Then, RP started sticking up for themselves. Thats it. Like I said several times. They are all GREAT oils. Everyone here can take a look at the emails and tell me what they think. I was just looking for opinions on what the changes and noticable differences people had using the more popular of the diesel synthetics. Got some good info out of all this though. LOL

 

Actually the winner is Valvoline Extreme Blue 5-40, under $20/gal at my local Cummins shop.