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Old 04-18-2016, 12:36 PM   #15
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Used it 4 a while...same thing buddies is a dealer got it cheap. What a hassel. Used it for about 50k between myn 7.3 and my wife's durango hemi.

Went back to Shell Rotella t. My dad is a retired diesel mechanic and retired from Cummins...it's all he used and it's al they used. Key is as said above change it. I change it in my diesels between 5-7500 miles and gas motors at 5k.


I don't buy expensive water to drink either, money saved by that buys great beer... that I drink like expensive water.
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Old 04-18-2016, 03:14 PM   #16
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Refer back to SmokeyWren. He said it better than I can. I prefer Delo over Rotella just because it looks a little cleaner coming out of the jug, but use both and totally trust both. IMO, Amsoil is 10% oil and 90% hype.
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Old 04-23-2016, 09:11 PM   #17
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I have ran "AMZ/OIL" in everything I have owned since the mid 70's.
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Old 04-24-2016, 10:50 AM   #18
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I have ran "AMZ/OIL" in everything I have owned since the mid 70's.
And ?

Is there evidence that "everything" wouldn't have lasted as long, with out it ?
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Old 04-24-2016, 11:12 AM   #19
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Chevron DELO 400 15w40 is used in equipment that the tires alone, cost more than the average TV. Use whatever you like
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Old 04-24-2016, 12:08 PM   #20
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Looking at tests it is the best you can get. And seeing how cummins oil change intervals are recommended every 15k miles(on my 15 6.7) I would get it because it lasts longer than other oil. As many miles as I put on a vehicle it would take me nearly 3 years to hit that! (yeah, i'll change it sooner).
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Old 04-24-2016, 12:09 PM   #21
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And ?

Is there evidence that "everything" wouldn't have lasted as long, with out it ?

Here is one example of how good the SEVERE GEAR is. 65K on RAM 3500 Dually with the WRONG 3.42's for towing 29K combined. 50K on the AMZ/OIL. Over 1/2 the miles towing.

Machining still showing on the teeth.

50K on the AMZ/OIL Universal ATF



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Old 04-24-2016, 05:22 PM   #22
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So, where is the one with regular oil ?

I understand you like the brand of oil but it is very difficult to prove, what did not happen, by using it.

As long as it's been around, the OEMs would have developed the same thing.
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Old 04-24-2016, 06:06 PM   #23
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Dont leave out Mobil 1300 Super, its not synthetic and as good as Rotella or Delo.
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Old 04-24-2016, 06:13 PM   #24
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Some OEMs are supplying full synthetic in new vehicles, not necessarily Amsoil.
I don't think there is any doubt it is good oil, but is the cost justified for the average driver/RV tower? There are so many variables in the consumer use of anything, that proving an oil better is mostly anecdotal. As twinboat said, visual evidence of wear when using Amsoil is pointless without a valid identical test (virtually impossible) to compare it to.
I used it for quite a while, but did not note any difference over my previous oil--and I was driving 60k miles/year.
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Old 04-24-2016, 06:56 PM   #25
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The new rams with the Cummins are coming with Synthetic factory fill.
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Old 04-24-2016, 08:28 PM   #26
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I ran Amsoil in a 2001 Cummins for 250000 miles before trading for a 2006 Dodge. Used Royal Purple in it. What I did was run an extra oil filter. Would change both filters at 10k and top off, send a sample to Blackstone labs, and run another 7500 or so. Never had an issue with it. Pulled the valve cover several times for maintenance and it was always clean.
Ran the RP at 7500 mile intervals in the '06, but that engine got beat on. Around
600hp, 1100tq, fast and fun. Sold it when we did the big rig, and run Delvo in it.
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Old 04-26-2016, 08:59 AM   #27
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So, where is the one with regular oil ?

I understand you like the brand of oil but it is very difficult to prove, what did not happen, by using it.

As long as it's been around, the OEMs would have developed the same thing.

The OE "IS" Synthetic as factory fill.
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Old 05-23-2016, 12:56 PM   #28
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Quote:
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Here is one example of how good the SEVERE GEAR is. 65K on RAM 3500 Dually with the WRONG 3.42's for towing 29K combined. 50K on the AMZ/OIL. Over 1/2 the miles towing.

Machining still showing on the teeth.

50K on the AMZ/OIL Universal ATF



Looks like wear marks to me. Machining would cover the entire surface and would be smooth, like the outer edges of the gears. The marks seem to show where the gears rubbed and were scored. I would question the quality of the oil if these were my gears.
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