State Emission Standards - Diesel: MASSACHUSETTS

2025 Ford Escape ST-Line Select HybridSECTION MASSACHUSETTS
MASSACHUSETTS EMISSION STANDARDS - DIESEL OPACITY

Application Opacity %
Light Duty (8500 GVWR Or Less)
1984 & Newer 20
Light Duty (8501-10,000 GVWR Or Less)
1984 & Newer 40
Heavy Duty Buses (10,000 GVWR Or More)
1984-93 40
1994 & Newer 30
Heavy Duty Trucks (10,000 Or Less GVWR)
1984-90 55
1991 & Newer 40
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.