15w-40: AMSOIL 15w40 Synthetic Diesel & Marine (AME)

Service Life of AMSOIL 15w40 Synthetic Diesel Oil

AMSOIL Synthetic 15W-40 Heavy Duty Diesel & Marine Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) vehicles or equipment as follows:

Personal Light Truck Diesel or Gasoline Engine Service

• Normal Service(3) – Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
  
  
• Severe Service(4) – Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.
  
  
• Replace AMSOIL Ea™ full flow oil filter at the time of oil change up to 25,000 miles (other brands at standard OEM^ intervals).
  

Commercial or Fleet Vehicles, Long-Haul Trucks, Marine Craft, RV, Off-Road Equipment

• Non-EGR equipped diesels – extend drain intervals up to two times (2X) the OEM^ recommended drain interval or one year, whichever comes first, or longer based on oil analysis.
  
  
• EGR equipped or low emission diesels – extend drain intervals based on oil analysis or use the OEM^ recommended interval.
  
  
• Replace Donaldson Endurance™ or AMSOIL Ea™ full flow oil filters at the time of oil change up to two times (2X) longer than the OEM^ standard interval, not to exceed 60,000 miles in long-haul trucks.
  

^OEM = Original Equipment Manufacturer

1. Modifications and Alterations – Engines operating under modified conditions are excluded from extended drain recommendations. Examples include the use of performance computer chips; non-OEM approved exhaust, fuel or air induction systems and the use of fuels other than those recommended for normal operation by the manufacturer.
   
   
2. Mechanically sound engines are in good working condition and do not, for example, leak oil or consume excessive amounts, are not worn out, do not overheat, do not leak anti-freeze and have properly working emission control systems. AMSOIL recommends repairing malfunctioning engines prior to the installation of AMSOIL synthetic oils.
   
   
3. Personal vehicles frequently traveling greater than 10 miles (16km) at a time and not operating under severe service.
   
   
4. Gasoline Engine Severe Service defined as turbo/supercharged engines, commercial or fleet vehicles, excessive engine idling, first and subsequent use of AMSOIL engine oil in vehicles with over 100,000 miles, daily short trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition driving.
   
   Diesel Engine Severe Service defined as extensive engine idling, daily short trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty condition driving.
   

For maximum engine protection, use only AMSOIL high efficiency oil and air filters, which offer, not only incredible contaminant removal ability, but also long change interval capability for maximum economy.

Note: Most quick lube service centers will install these products upon request or you can install them yourself.

Additional Info via the Links Below:

page 1 : Product Selection, Usage & Order Links
page 2 : Alternative Products
page 3 : Additional Products to Consider
page 4 : Full Product Description
page 5 : Applications for This Product
page 6 : Typical Technical Specifications
page 7 : Mixing with Other Lubes
page 8 - current : Service Life
page 9 : Health & Safety