Ford Study Year One Update

Efficiency (MPG) S. D. n

Baseline 19.65 0.42 8

Test only 19.41 0.81 43

Combined 19.45 0.76 51

ULSD (96000, #105681, Brian, Mason City)

Efficiency (MPG) S. D. n

Baseline 19.91 0.69 7

Test only 19.84 1.00 39

Combined 19.85 0.96 46

Efficiency (MPG) S. D. n

Baseline 20.36 1.72 6

Test only 19.52 0.71 42

Combined 19.63 0.91 48

Soy B20 (96001, #105679, Steve, Des Moines)

Tallow B20 (95999, #105680, Larry, Carroll)

• No significant differences exist between the baseline and test MPG for any of the three trucks.

• No significant differences exist for the composite data among all three trucks.

• No significant trends exist regarding fuel efficiency as a function of temperature or duration of study, with the possible exception of the ULSD truck where the slope of the trend-line for MPG vs time (in weeks) was significantly different than zero.

Engine load as a function of temperature.Engine load generally increases as the temperature increases. No major differences are evident among the three trucks.

Unit Load (%)

S. D. n

ULSD 55.48 5.63 51

Soy 51.76 5.09 47

Tallow 54.79 5.17 48

Unit Temp (°C)

S. D. n

ULSD 12.72 10.66 51

Soy 14.90 10.75 48

Tallow 12.88 10.18 48

Average Load Average Temperature

Overlapping standard deviations suggest no real differences among the three trucks.The data suggests a trend where temperature and load are negatively correlated.

Engine load as a function of fuel efficiency.No correlation appears to exist between engine load and fuel efficiency in any of the three trucks.

Unit Efficiency(MPG)*

S. D. n

ULSD 19.45 0.76 51

Soy 19.85 0.95 46

Tallow 19.62 0.91 48

Average Load Average Fuel Efficiency

Unit Load (%)

S. D. n

ULSD 55.48 5.63 51

Soy 51.76 5.09 47

Tallow 54.79 5.17 48

Overlapping standard deviations suggest no real differences among the three trucks.*Values represent combined baseline and test data.

Engine load as a function of exhaust pressure.Exhaust pressure generally increases as the engine load increases. No differences appear to exist among the three trucks.

Unit Exhaust (kPa)

S. D. n

ULSD 155.4 4.35 51

Soy 153.9 6.64 47

Tallow 150.0 4.47 48

Average Load Average Exhaust Pressure

Unit Load (%)

S. D. n

ULSD 55.48 5.63 51

Soy 51.76 5.09 47

Tallow 54.79 5.17 48

Overlapping standard deviations suggest no real differences among the three trucks.The data suggest a trend where load and exhaust pressure are positively correlated.

Parameter Units Average S. D. n

% Biodiesel % 0.048 0.114 26

Ox. Stability Hr. 13.82* 1.76 13

Water/Sed. % Mass 0.012* 0.011 2

TAN Mg KOH/g 0.007 0.010 25

Cloud °C -14.22 2.61 27

ULSD Fuel Quality

*Average of tests with quantifiable results. 13 oxidation stability test results were greater than 16 hours.

Fuel Quality: B100 Stock for Soy BlendParameter Units Average S. D. n

% Biodiesel % 99.71 2.39 2

Ox. Stability Hr. 9.26 0.764 2

Water/Sed. % Mass < 0.005 -- 2

TAN Mg KOH/g 0.215 0.035 2

Cloud °C -1.0 0 2

Parameter Units Average S. D. n% Biodiesel % 19.08 0.95 4

Ox. Stability Hr. 11.77 5.98 4

Water/Sed. % Mass < 0.005 -- 4

TAN Mg KOH/g 0.050 0.016 4

Cloud °C -11.5 1.73 4

Cetane -- 45.1 -- 1

Fuel Quality: Soy B20 Supply Tank

Fuel Quality: Soy B20 External TankParameter Units Average S. D. n

% Biodiesel % 19.33 -- 1

Ox. Stability Hr. 5.75 -- 1

Water/Sed. % Mass < 0.005 -- 1

TAN Mg KOH/g 0.070 -- 1

Cloud °C -10.0 -- 1

Parameter Units Average S. D. n% Biodiesel % 1.36 -- 1

Ox. Stability Hr. 18 -- 1

Water/Sed. % Mass < 0.005 -- 1

TAN Mg KOH/g 0 -- 1

Cloud °C -14.0 -- 1

Fuel Quality: ULSD Stock for Tallow Blend

Fuel Quality: B100 Stock for Tallow BlendParameter Units Average S. D. n

% Biodiesel % 99.61 -- 1

Ox. Stability Hr. 4.2 -- 1

Water/Sed. % Mass < 0.005 -- 1

TAN Mg KOH/g 0.240 -- 1

Cloud °C 6.0 -- 1

Parameter Units Average S. D. n% Biodiesel % 17.24 2.55 4

Ox. Stability Hr. 6.68 1.26 4

Water/Sed. % Mass 0.010 -- 1

TAN Mg KOH/g 0.060 0.008 4

Cloud °C -11.5 2.38 4

Cetane -- 47.8 -- 1

Fuel Quality: Tallow B20 Supply Tank

Fuel Quality: Tallow B20 External TankParameter Units Average S. D. n

% Biodiesel % 31.74 -- 1

Ox. Stability Hr. 6.89 -- 1

Water/Sed. % Mass < 0.005 -- 1

TAN Mg KOH/g 0.100 -- 1

Cloud °C -8.0 -- 1

• Conclusion: after one year, the performance of all three trucks is statistically identical.