Gash
Well Known Member
I sent an email this week to Ed Kollin at Camguard asking his opinion of Aeroshell 15W-50, as I had heard some conflicting opinions. I asked him to provide some facts to help me decide what to use. He was kind enough to reply with the following email. I am copying it here for everyone--I hope you find it useful as well:
=============================================
Hello Karl,
I do not like or recommend either of the two semi-synthetic oils that are
available, Aeroshell 15W-50 or Exxon Elite. Both contain PAO synthetic
basestock which in my opinion, is the worst possible basestock for use in
aircraft (but great for cars). Aircraft engines contaminate their oil with a
lot of blow-by fuel. PAO is horrible in dealing with contamination and
this lead to greater varnish and carbon deposits throughout the engine.
The Aeroshell 15W-50 and Plus oils also contain a triphenyl phosphate
anti-scuff that decomposes and attacks seals in the engine. Camguard
protects seals from this chemical attack.
The Elite (which I did the initial research on when I worked at Exxon
Research) contains a multi-functional (dispersant) viscosity modifier which
holds water and forms a soft brown sludge in cool running aircraft.
I recommend Phillips 20W-50 or Aeroshell W100 oils. And of course with
Camguard as the additive package to prevent rust and deposits, reduce wear
and condition seals.
Regards,
Ed
Edward Kollin
Technical Director
Aircraft Specialties Lubricants
=============================================
Hello Karl,
I do not like or recommend either of the two semi-synthetic oils that are
available, Aeroshell 15W-50 or Exxon Elite. Both contain PAO synthetic
basestock which in my opinion, is the worst possible basestock for use in
aircraft (but great for cars). Aircraft engines contaminate their oil with a
lot of blow-by fuel. PAO is horrible in dealing with contamination and
this lead to greater varnish and carbon deposits throughout the engine.
The Aeroshell 15W-50 and Plus oils also contain a triphenyl phosphate
anti-scuff that decomposes and attacks seals in the engine. Camguard
protects seals from this chemical attack.
The Elite (which I did the initial research on when I worked at Exxon
Research) contains a multi-functional (dispersant) viscosity modifier which
holds water and forms a soft brown sludge in cool running aircraft.
I recommend Phillips 20W-50 or Aeroshell W100 oils. And of course with
Camguard as the additive package to prevent rust and deposits, reduce wear
and condition seals.
Regards,
Ed
Edward Kollin
Technical Director
Aircraft Specialties Lubricants