Since significant changes were noted between Dynamometer Test #1 and Dynamometer Test #3, it is reasonable to conclude that once the Royal Purple/Long Rider had a chance to "work" in the engine, bearing surface polish increased and ring seal improved as the engine was cleaned.

Additional testing was done to note the potential for change in emissions using Royal Purple/Long Rider oil. These tests were conducted in a HEVI instructional lab at OSU-Okmulgee. The test engines were:

Snap tests were run using a CalTest J-41400 Smoke Opacity Meter according to test procedures provided in the instruction manual.

The testing guidelines and procedures were:

NOTE: Preconditioning snaps were taken to purge the exhaust systems. The test results do not reflect the preconditioning snaps.

TEST RESULTS:

DETROIT SERIES 60

Test Results - Dynamometer Test #1 vs. Dynometer Test #3

C12

FUEL FLOW

IMPROVEMENTS

SHELL/RP

SHELL RP

SHELL RP

RPM

MPH

HP

GPH

HP

GPH

MPG*

1200	38	344	349	17.0	16.6	5	.3	.25
1400	44	386	390	18.8	18.3	4	.5	.28
1600	51	407	413	20.7	19.9	6	.8	.50
1700	54	398	409	20.6	19.7	11	.9	.55

Test Results - Dynamometer Test #1 vs. Dynometer Test #3

Unit #2

3406E

FUEL FLOW

IMPROVEMENTS

SHELL/RP

SHELL RP

SHELL RP

RPM

MPH

HP

GPH

HP

GPH

MPG*

1200	35	369	377	21.8	21.1	8	.7	.31
1400	41	421	426	22.6	21.7	5	.9	.31
1600	47	443	444	21.3	20.9	1	.4	.55
1700	53	408	412	18.5	18.1	4	.4	.45

Test Results - Dynamometer Test #1 vs. Dynometer Test #3

Unit #3

3406E

FUEL FLOW

IMPROVEMENTS

SHELL/RP

SHELL RP

SHELL RP

RPM

MPH

HP

GPH

HP

GPH

MPG*

1200	38	355	357	18.2	17.5	2	.7	.45
1400	41	409	411	20.7	20.1	2	.6	.40
1600	51	426	419	21.8	21.0	7	.8	.50
1700	54	411	414	21.4	20.4	3	1.09	.60

 

* Fuel flow improvements have been converted into MPG savings in tenths of MPG.

  CONCLUSIONS:

Since significant changes were noted between tests, it is reasonable to conclude that Royal Purple/LongRider has attributes that affect engine performance.

Since 1985 Royal Purple has produced high performance synthetic lubricants. The company literature states that their proprietary ingredient, Synerlec, reduces friction and forms a super tough oil film that cannot be squeezed out of pressure areas. This additive is included in the formulation of Royal Purple/LongRider diesel engine oil that was used in our tests. Our test results would indicate that less friction between the rings and cylinder walls resulted in a more complete combustion which in turn improved horsepower and reduced harmful emissions on less fuel consumption. The low coefficient of friction in the bearings would also enhance the ability to improve performance in these areas as well as substantiate the company's claims of lower operating temperatures.

Since little difference was seen in the results of the 1st and 2nd tests, but dramatic differences between the 1st and 3rd tests, it would indicate that the micro-polishing of the wear surfaces does occur with extended use of Royal Purple/LongRider.

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Royal Purple™ and Synerlec™ are trademarks of Royal Purple, Inc. - Long Rider™ is a trademark of Royal Purple Transportation Marketing, Inc.  1996 Royal Purple Transportation Marketing, Inc.