Evaluation of Technol G,
         A Fuel Additive
           August 1972
       Henry L. Gompf -
Control Device Evaluation Section
  Environmental Protection Agency

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Background

      The Office of Air Programs was requested .to evaluate
Technol G, a fuel additive.  With the request the Oil Technology
Corporation supplied a test report on Technol G from the Stevens
Institute of Technology.  Using the 7-mode/7-cycle Federal
procedure with a cold start, Stevens Institute reported a 12%
reduction in hydrocarbon level and a 17% reduction in carbon
monoxide level on a 1967 Oldsmobile with the use of Technol G.
No effect on the oxides of nitrogen level was reported.  The
Test and Evaluation Branch arranged a confirmatory evaluation
in the Ann Arbor laboratory.

Additive Description

      The manufacturer recommends that Technol G be mixed with
gasoline in the volumetric proportion of one part Technol G
to every one-thousand parts of gasoline.  The manufacturer
further states that Technol G is a -petroleum distillate con-
taining "no salts, acids or heavy metals".  The odor of
Technol G suggests that the additive contains naphthalene.  No
description of the full composition of the additive was provided,

Test Procedure

      Baseline and additive tests were performed using a 1962
Chevrolet equipped with a 283 CID engine and automatic trans-
mission.  Technol G was added to Indolene 30, a standard test
fuel specified in the Federal procedures, in the proportions
recommended by the manufacturer.  The vehicle was driven about
15 miles after fuel treatment to insure mixing and mixture
delivery to the engine fuel system.

      All testing was performed in accordance with the standard
Federal emission test procedure as specified for 1975.  Details
of this procedure are presented in the July 2, 1971, Federal
Register.  Testing was conducted from a cold start.

Test Results

      Complete test results for the baseline and additive are
presented in the Appendix of this report.  The following effects
using Technol G were measured.

                   Hydrocarbon        6% reduction
                   Carbon Monoxide    4% reduction
                   Carbon Dioxide     4% reduction
                   Oxides of Nitrogen 12% increase

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      The changes in hydrocarbon, carbon monoxide, and carbon
dioxide are well within the expected bounds of test variability
for a single vehicle evaluation.  Oxides of nitrogen emissions
seem to have been adversely affected with the addition of
Technol G. .

Conclusions

      1.   No beneficial effect on hydrocarbon or carbon monoxide
      emission could be measured due to normal test variability
      masking.

      2.   A small adverse effect on oxides of nitrogen emission
      was measured.

      3.   Due to the low magnitude of the emission changes
      measured,  to adequately evaluate Technol G, a fleet
      evaluation would be necessary to definitively show the
      overall effect.

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          1975 Federal Emission Test Results
            (all results in grams per mile)

Baseline
6/29/72
7/03/72
7/05/72
7/06/72
Average
Technol G
7/12/72
7/13/72
Technol G
HC
4.93
4.97
4.51
4.34
4.69
HC
4.61
4.21

CO
44.13
40.97
33.20
33.08
37.84
CO
36.55
36.03

CO.,
559.87
544.92
545.20
553.92
550.98
C07
519.89
541.45

NOx
3.74
3.68
3.58
4.17
3.79
NOx
4.22
4.27
            Average
4.41
36.29
530.67
4.25
Percent Reduction
from Baseline
                  4%
                  -12%*
*increase

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