Continental Engine Oil Recommendations for Normal Operation:

  • If outside air temperature is between -17C and +21C, then use AeroShell W80 ashless dispersant engine oil.
  • If outside air temperature is between +15C and +30C, then use AeroShell W100 ashless dispersant engine oil.
  • If daytime and nighttime outside air temperature is greater than +26C, then use AeroShell W120 ashless dispersant engine oil.
  • Note: The "W" in the product name means that the product contains ashless dispersants that bind to contaminants in your oil that get filtered out of the system by your oil filter to keep them from recirculating through your engine.  The "W" does not mean "winter" or "winterized," and has nothing at all to do with temperature ratings.

Lycoming Engine Oil Recommendations for Normal Operation:

  • If outside air temperature is between -17C and +21C, then use AeroShell W80 Plus ashless dispersant engine oil, which already includes the Lycoming additive.
  • If outside air temperature is between +15C and +30C, then use AeroShell W100 Plus ashless dispersant engine oil, which already includes the Lycoming additive.
  • If daytime and nighttime outside air temperature is greater than +26C, then use AeroShell W120 engine oil, and manually add Lycoming Oil Additive LW-16702.
  • Note 1: Products with "Plus" in their name already have Lycoming additive in them in the proper amounts and fully meet the requirements of Lycoming Mandatory Service Bulletin #446E, and FAA Airworthy Directive #80-04-03 R2.  The Lycoming MSB and the FAA AD apply to all Lycoming O-320-H, O-360-E, LO-360-E, TO-360-E, and LTO-360-E engines.  If you have one of these engines, you MUST have the Lycoming additive in your oil to be airworthy.  Even if you don't have one of those engine models, Lycoming still recommends that all Lycoming engines use it.
  • Note 2: Even though multiweight AeroShell W15W-50 ashless dispersant engine oil already includes the Lycoming additive (confusingly, without the "Plus" in the name, we have confirmed with Shell that it does include the additive), we do not recommend its use in any engine and we do not sell this oil.  The additive that allows this oil to be a multiweight oil turns acidic over time and can cause an engine that isn't used on a daily basis to have issues with abnormal wear and tear.  If you feel that you need a multiweight oil because of variable outside air temperatures, you will get better results by properly pre-heating your engine before starting it and using the appropriate single weight oil.

For all Engines and Cylinders in Normal Operation:

  • Add CamGuard Aviation Additive at each oil change for extra engine protection.  Do not add CamGuard during engine or cylinder break-in.

New Engine/New Cylinder Break-In Oil Recommendations for both Continental and Lycoming Engines:

  • If outside air temperature is between -17C and +21C, then use AeroShell 80 mineral engine oil.
  • If outside air temperature is between +15C and +26C, then use AeroShell 100 mineral engine oil.
  • If daytime and nighttime outside air temperature is less than -17C or greater than +26C, then do not attempt to break-in a new engine or new cylinders in these atmospheric conditions.
  • Note: You will notice that AeroShell break-in oil product names do not include "W" or "Plus."  Break-in oil is straight mineral oil without any additives or ashless dispersants.  For maximum life of your engine and cylinders, this oil should only be used until your cylinder rings break-in, and then you should change your filter and switch to the proper oil for your engine.  Do not run this oil for more than about 15-20 hours.  If your rings have not properly seated and broken-in by that time, then you have some potentially serious problems that need to be immediately investigated by your mechanic before flying your aircraft.
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