[David-aviator]

Lycoming issued Service Instruction 1409C last February.

http://www.lycoming.com/support/publications/service-instructions/pdfs/SI1409C.pdf

This instruction has to do with the use of LW-16702, the stuff that came out years ago in the form of an AD on the 0320 H series of engines. If I read the February publication correctly, Lycoming now recommends LW-16702 for all Lycomng engines except those with a "friction type clutch", whatever that is.

It appears that Aeroshell 15W-50 has LW-16702 in it, but Phillips 66 X/C 20W-50 does not which means one should add a can of LW-16702 with the Phillips product. Am I correct in this assessment? Phillips 66 Type 100 AW oil has the additive but it is a single grade 50 weight oil.

Years ago I used Avblend but no LW-16702 (they cost about the same). How many guys are using either, or NONE?

I'd do a survey but I have not learned how.

 

[az_gila]

The AeroShell Oil...

..."plus" versions of 80W and 100W also contain the additive, and about $5-$6 per case extra price.

Better than the $23 for a 6 oz bottle (one oil change) of the LW-16702 stuff...

Lycoming issued Service Instruction 1409C last February.

http://www.lycoming.com/support/publications/service-instructions/pdfs/SI1409C.pdf

This instruction has to do with the use of LW-16702, the stuff that came out years ago in the form of an AD on the 0320 H series of engines. If I read the February publication correctly, Lycoming now recommends LW-16702 for all Lycomng engines except those with a "friction type clutch", whatever that is.

It appears that Aeroshell 15W-50 has LW-16702 in it, but Phillips 66 X/C 20W-50 does not which means one should add a can of LW-16702 with the Phillips product. Am I correct in this assessment? Phillips 66 Type 100 AW oil has the additive but it is a single grade 50 weight oil.

Years ago I used Avblend but no LW-16702 (they cost about the same). How many guys are using either, or NONE?

I'd do a survey but I have not learned how.

 

[David-aviator]

..."plus" versions of 80W and 100W also contain the additive, and about $5-$6 per case extra price.

Better than the $23 for a 6 oz bottle (one oil change) of the LW-16702 stuff...

Here is the FAA approved list of oils with LW-16702 (something similar to it).

http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgSAIB.nsf/dc7bd4f27e5f107486257221005f069d/ff4d60a7a05f64bc862575a700502143/$FILE/NE-06-31R2.pdf

Table 1
Additized Oil Date of AMOC Approval
Aeroshell Oil W 15W-50 November 9, 1987
Aeroshell Oil W 100 Plus May 4, 1999
Exxon Aviation Oil Elite 20W-50 January 24, 2000
Castrol Aviator AD 65 May 27, 2003
Castrol Aviator AD 80 May 27, 2003
Castrol Aviator AD 100 May 27, 2003
Castrol Aviator AD 120 May 27, 2003
Aeroshell Oil W 80 Plus February 6, 2006
Phillips 66 Type 100 AW April 4, 2006