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FUEL FACTORS FOR     FLEETS How Fuel Trumps Mileage –       Every Time
What Is Fuel To You?• Your Largest Cost after Salaries• Equal to Salaries at $3.29/gallon• Lost Expense in Surcharges: Lar...
What Does Fuel Really Cost?• Fifty Truck Fleet achieving 6.0 MPG• Prices of diesel - $3.00/gallon• Assumes 130,000 miles p...
OK, fuel is important but…HOW FLEETS CHANGE FUELECONOMY?
SAE Factors AffectingFuel Economy• Controllable:  – Speed  – Inflation  – Air Resistance  – Tire Rolling Resistance  – Loa...
The Cost Of Speed-Controllable Factor                                             75                                 70   ...
Inflation - Controllable Factor• 90% of tire failures stem  from improper inflation         You spend                     ...
Inflation in the Real WorldContinental study                                             80  80                           ...
Inflation Effects                                                       Increased deformation:                            ...
Controllable Factors: Once the easiest factors (speed and inflation) arecontrolled, we have to account for driving resista...
Driving resistance - Impact onfuel consumption   Driving power = Driving resistance (aerodynamic,   acceleration, uphill a...
Driving resistance - Impact on   fuel consumption                 35                 %At average fleet operating condition...
Aerodynamics – Controllable Factor   • 20% better fuel economy   • Aerodynamic truck vs. no aerodynamic devices   • 5-10% ...
Controllable FactorsTIRE ROLLING RESISTANCE
Rolling Resistance Effect on Fuel       Steer     Drive       Trailer       Axle:     Axle:       Axle:       15%       42...
FUEL FACTORS THE FLEET CANCHANGE
Recommendations: CommonSense Maintenance• Inflation    – Twice Monthly Airing /Inflate Trailers/Flat Checks    – FMCSA Roa...
Recommendations:Common Sense Driving• Review Speeds: 70mph to 67mph saves 5%    – Use the cruise control    – Optimal RPM ...
Avoid These Fuel Wasters•   Excessive Speed•   Stop-and Go Driving Style•   Under Inflated Tires (10% Under =1% Loss)•   L...
For More Information• Mathew Rutledge• Key Account Manager, Navistar• mat.rutledge@conti-na.com
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Navistar - Fuel Factors for Fleets

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Learn how tire selection and technologies can make a difference in fuel economy for trucking fleets, as well as tactics to share with your customers. Prepared for Navistar by Continental Commercial Vehicle Tires.

Published in: Automotive
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Navistar - Fuel Factors for Fleets

  1. 1. FUEL FACTORS FOR FLEETS How Fuel Trumps Mileage – Every Time
  2. 2. What Is Fuel To You?• Your Largest Cost after Salaries• Equal to Salaries at $3.29/gallon• Lost Expense in Surcharges: Large Fleets not recovering full costs
  3. 3. What Does Fuel Really Cost?• Fifty Truck Fleet achieving 6.0 MPG• Prices of diesel - $3.00/gallon• Assumes 130,000 miles per year• Your fleet spends $61,280 per truck• $3,064,000 in fuel per year• Decrease fuel economy to 5.6 MPG = You now pay $65,640 per truck and $3,282,000 per year Diesel prices leveling – – That’s an additional: but when will it rise • $4,360 for each truck again? • $218,000 for your fleet
  4. 4. OK, fuel is important but…HOW FLEETS CHANGE FUELECONOMY?
  5. 5. SAE Factors AffectingFuel Economy• Controllable: – Speed – Inflation – Air Resistance – Tire Rolling Resistance – Load – Drive Line Friction• Not Controllable: – Road Surface – Ambient Temperature – Terrain
  6. 6. The Cost Of Speed-Controllable Factor 75 70 3.6 65 4.4 MPG MPG 26% 40% 5.5 MPG Loss Loss 60 8% Loss 6 MPG Source: Paccar/Kenworth
  7. 7. Inflation - Controllable Factor• 90% of tire failures stem from improper inflation You spend 1% more on fuel• “Tire tread wears 9 -16 percent faster for every 10 percent a tire is below its fleet specified With every 10 pressure.” - TMC PSI of underinflation!
  8. 8. Inflation in the Real WorldContinental study 80 80 60 60 40 40 20 20 0 too high zu hoch ok i.O. zutoo low niedrig 0 >10% >10% too high ok too low zu hoch i.O. zu niedrig >10% >10% 30% of power units 40% of trailers are are running too low! running too low!
  9. 9. Inflation Effects Increased deformation: = increased fuel consumption = increased stress Inflation pressure 130% Inflation pressure 100% Inflation pressure 70% Overinflation vs. load Correct value Underinflation / overload
  10. 10. Controllable Factors: Once the easiest factors (speed and inflation) arecontrolled, we have to account for driving resistance factors.DRIVING RESISTANCE FACTORS
  11. 11. Driving resistance - Impact onfuel consumption Driving power = Driving resistance (aerodynamic, acceleration, uphill and rolling) x speed
  12. 12. Driving resistance - Impact on fuel consumption 35 %At average fleet operating conditions – between rural and highway operations – rolling resistance accounts for about 35% of fuel consumption.
  13. 13. Aerodynamics – Controllable Factor • 20% better fuel economy • Aerodynamic truck vs. no aerodynamic devices • 5-10% • Adding full roof flairing when pulling a van trailer • 2-4% • Adding options such as side extender flairing and chassis flairing • 1-2% • Using under hood air cleaners vs. cowl mounted air cleaners • 1-2.5% • Using proper fifth wheel settings at an optimal 38” trailer gap
  14. 14. Controllable FactorsTIRE ROLLING RESISTANCE
  15. 15. Rolling Resistance Effect on Fuel Steer Drive Trailer Axle: Axle: Axle: 15% 42.5% 42.5% of RR of RR of RR
  16. 16. FUEL FACTORS THE FLEET CANCHANGE
  17. 17. Recommendations: CommonSense Maintenance• Inflation – Twice Monthly Airing /Inflate Trailers/Flat Checks – FMCSA Roadside Survey: only 44% of all tires are within 5PSI of their target inflation – 12% of tires of surveyed tires are in danger of premature failure – Properly Inflated Tires: • Wear more evenly and at a slower rate • Ten PSI below recommended pressure costs 1% in fuel economy • Fleet inflation programs reduce road calls• Fuel Efficient Tires and Retreads• Alignments/VAI• Matching of Tires• Management Commitment
  18. 18. Recommendations:Common Sense Driving• Review Speeds: 70mph to 67mph saves 5% – Use the cruise control – Optimal RPM for the Engine• Reduce Idling• Fleet Top Fuel Performers Driver training• Driver Training TMC• Driver Incentives (Speed Bonuses, MPG Average)• Progressive shifting/ Staying in High Gear
  19. 19. Avoid These Fuel Wasters• Excessive Speed• Stop-and Go Driving Style• Under Inflated Tires (10% Under =1% Loss)• Long Idling periods over 5 minutes• Misalignment• Open Windows (Loss is 4%)• Running A/C• Mismatched Tires• Fuel Inefficient Tires• Idling
  20. 20. For More Information• Mathew Rutledge• Key Account Manager, Navistar• mat.rutledge@conti-na.com

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