8.2% Better MPG
AMSOIL Products Improve Efficiency and Reduce
Operating Costs for Gerlach Trucking

AMSOIL INC., in conjunction with Gerlach Trucking of Erskine, Minnesota, conducted a field demonstration of its
Series 3000 Synthetic 5W-30 Heavy Duty Diesel Oil, Super Duty Oil Filters and Dual-Gard filtration system equipped
with BE-110 by-pass filtration elements.

The test vehicle was a 1995 Freightliner FLD-120 powered by a Detroit 60 Series diesel engine and utilized mainly in
long-haul transports. The testing covered a two-year period and the vehicle accumulated 212,326 total miles.

Evaluation Proposal
The goals for this demonstration included showing that the use of AMSOIL Series 3000 5W-30 Heavy Duty Diesel
Oil, in conjunction with the AMSOIL Dual-Gard filtration setup and SDF Oil Filters, would result in improved efficiency,
reduced operating costs and environmental benefits when compared to conventional petroleum lubricants and
filtration methods. As mentioned, the evaluation was conducted using a 1995 Freightliner FD-120 equipped with a
Detroit 60 Series diesel engine. The AMSOIL Series 3000 5W-30 Heavy Duty Diesel Oil was sampled at the
manufacturer’s suggested oil drain intervals and monitored through the use of oil analysis to ensure its continued
serviceability. The full-flow filtration units were also monitored and replaced at 12,000- to 15,000-mile intervals, while
the By-Pass units were monitored and replaced at 24,000- to 30,000-mile intervals.
Miles on Oil


0
15470
34075
55071
72348
96493
119436
146883
169390
194205
212326
Iron (Fe)

PPM PPM p/mile
0 0
20 0.001293
27 0.000792
43 0.000781
54 0.000746
58 0.000601
46 0.000385
86 0.000586
87 0.000514
81 0.000417
83 0.000391
Chromium (Cr)

PPM PPM p/mile
0 0
1 0.000065
1 0.000029
2 0.000036
2 0.000028
2 0.000021
1 0.000008
3 0.000020
2 0.000012
2 0.000010
2 0.000009
Copper (Cu)

PPM PPM p/mile
0 0
2 0.000129
2 0.000059
2 0.000036
3 0.000041
3 0.000031
2 0.000017
5 0.000034
4 0.000024
4 0.000021
4 0.000019
Lead (Pb)

PPM PPM p/mile
0 0
4 0.000259
5 0.000147
7 0.000127
9 0.000124
10 0.000104
10 0.000084
21 0.000143
20 0.000118
15 0.000077
16 0.000075
Aluminum (Al)

PPM PPM p/mile
0 0
8 0.000517
6 0.000176
7 0.000127
7 0.000097
7 0.000073
6 0.000050
9 0.000061
7 0.000041
8 0.000041
7 0.00003
Viscosity                                                   Degradation

100 º C                       % OXD             % NOX            TBN                   Soot/Solids

11.70                            0.0                      0.0            12.00                       0.0
10.95                            5.6                     15.7           11.34                       0.0
10.64                            7.8                     20.0             6.23                       0.0
10.37                          11.1                     21.4             9.98                       1.2
10.84                          17.8                     25.7           11.31                       1.2
10.70                          15.6                     25.7             9.62                       1.0
10.88                           26.7                    37.1             8.62                       1.2
10.71                           16.7                    30.0             9.05                       1.7
10.70                           26.7                    41.4             8.20                       1.6
10.50                           11.1                    31.4             9.00                       1.0
10.80                           40.0                    52.8             8.10                       1.1

*PPM = Parts Per Million
8.2% Better MPG
Summary
Overall, the demonstration was a success. After switching to AMSOIL Series 3000 5W-30 Heavy Duty Diesel Oil
(and later AMSOIL 75W-90 Gear Lube in the differentials and Power-Shift Transmission Fluid in the Transmission),
the truck experienced significant declines in wear rates and an
8% increase in fuel economy. The pictured charts
show individual rates of wear throughout the two-year demonstration. As the engine wear rates were reduced,
operating efficiency rose, leading to an increase in the life of the engine and decreasing operating costs. Even with
212,326 miles on the oil, there was no indication it needed changing. Because of the extended drain capabilities of
AMSOIL Series 3000 5W-30 Heavy Duty Diesel Oil, the negative effects of used oil on the environment were also
significantly reduced. If it had been using conventional petroleum diesel oil, which usually requires replacement
approximately every 18,000 miles, this application would have required up to 12 oil changes and 480 quarts of oil
over the demonstration running time of 212,326 miles, compared to just one oil change and 40 quarts of oil using
AMSOIL Series 3000 5W-30 Heavy Duty Diesel Oil and Dual-Gard filtration system. Overall, the data demonstrates
that AMSOIL Series 3000 5W-30 Heavy Duty Diesel Oil is capable of providing extended drain service for a period
well beyond recommended drain intervals, while also significantly decreasing wear rates, operating costs and
environmental waste.
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