How do I select the right single grade piston engine oil

Non-dispersant mineral oils (straight single grade oils)

• Blended from high viscosity index (HVI) base stocks
• Do not contain additives except for a small amount of pour-point depressant and an anti-oxidant
• Grades must be selected and changed to suit the climate(temperature)
• Available in Grades 65, 80, 100 and 120
• Used for the break-in process on new or recently overhauled engines. This helps the piston ring and cylinder wall mate together and create a good gas seal
• Approved to SAE-J-1966(formerly MIL-L-6082E).

Ashless dispersant single grade oils

• Blended from HVI base stocks and non-metallic additives to give exceptional stability, dispersancy and antifoaming properties
  
• Used for the normal operation of all four-stroke aviation piston engines
  
• Grades must be selected and changed to suit the climate (temperature)
  
• Approved to SAE-J-1899 (formerly MIL-L-22851D)
  
• Available in Grades W80, W100 and W120, as well as W80 Plus and W100 Plus
  
• AeroShell Oil W80 Plus and W100 Plus are premium single-grade oils containing the standard additives of ashless dispersant oils plus an anti-wear additive, a corrosion inhibitor and a metal passivator. These advanced additives provide extra protection against corrosion, rust and wear.

Selecting the correct grade

The AeroShell straight and W series oils should be selected and changed to suit the climate.