2 cycle oil sound test results!!!! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 16 (permalink) Old 04-26-2008, 02:58 AM Thread Starter
 
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Post 2 cycle oil sound test results!!!!

OK boys and girls.........the results are in-
Here is the setup:

Does 2 cycle oil actually quiet the engine, or is it all in our warped minds??

For the test:
>I parked my truck in it's usual spot on the driveway
>Placed a tape measure on the ground perpendicular to the left front wheel
>Placed a digital sound meter on an 8" high photo tripod with the sound pickup at 36" from the wheel.
>Recorded sound measurements on fast response, "c" weighting and adjusted scale for decibel range.
>Sound measurements were taken with truck at operating temperature, no accessories on (a/c, htr., lights, etc.)
>Measurements recorded for truck at idle and 2000 rpm in park, auto trans.
>Setup was duplicated for straight ULSD and 128:1 2 cycle oil mix, both tests conducted at approximately 6:30 pm PDT., several days apart.



Test #1- 128:1 2 cycle oil (I already had the mix on board, so I ran this test first):

>Reading at idle- 79 db
>Reading at 2000 rpm- 89 db

Test #2- Fuel tank run as low as I dared, then filled with straight ULSD, driven for 125 mi., then tested:

>Reading at idle- 84 db
>Reading at 2000 rpm- 92 db


Conclusion:

The addition of 2 cycle oil at a ratio of 128:1 (or 1 oz/gallon) attenuates or reduces the sound generated by the diesel engine at idle 5 db, and 3 db at 2000 rpm.

Subjectively, the tester felt that the truck ran more smoothly overall and displayed less perceived vibration in-cab with the addition of 2 cycle oil, and also the 5 db sound attenuated recorded was easily noticed both in-cab and standing outside.

Respectfully,

Jonesie.
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post #2 of 16 (permalink) Old 04-26-2008, 03:01 AM
 
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Ive been runnin 2 cycle in my 24V Cummins for 6 months now! :Thumbup: Theres been times where I have filled up in between without 2 cycle and can def tell and hear a difference in how the truck idled.
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post #3 of 16 (permalink) Old 04-26-2008, 03:05 AM Thread Starter
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Sorry, here are the pics- I was in such a hurry to post I forgot!

Attachment 17425 Straight ULSD setup
Attachment 17427 Idle straight ULSD
Attachment 17428 2000 RPM straight ULSD
Attachment 17426 2 cycle setup
Attachment 17429 Idle 2 cycle
Attachment 17430 2000 RPM 2 cycle
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post #4 of 16 (permalink) Old 04-26-2008, 03:08 AM
 
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Good pics man. That def shows the difference!
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post #5 of 16 (permalink) Old 04-26-2008, 04:29 AM
 
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I know I can tell a difference. Now I there is hard evidence. Thanks
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post #6 of 16 (permalink) Old 04-26-2008, 02:51 PM
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Right on! More information to post up on my web site for others to see! Thank you for your time and the information...:Thumbup:

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #7 of 16 (permalink) Old 04-26-2008, 02:53 PM
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Nice job man,....I'm glad I nominated ya.......lol

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post #8 of 16 (permalink) Old 04-26-2008, 03:31 PM
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What 2 Cycle are you using? Just add it straight to the fuel tank?

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post #9 of 16 (permalink) Old 04-26-2008, 03:34 PM
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way to go Jonesie.....great job right there!!!!!!!




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post #10 of 16 (permalink) Old 04-26-2008, 03:38 PM
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Here is my write up on Jonesie hard work and testing... Thank you! :Thumbup:
http://mopar.mopar1973man.com/2002-d...l/db-level.htm

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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