The commonly used kinematic viscosity is defined as a measure of the restrictive
flow of a fluid under gravitational force, its not a measurement of thickness...
The SI unit for kinematic viscosity is one meter squared per second and is
equivalent to 10,000 St. Usually, centistokes (cSt) is used (1 cSt =0.01 St = 1 mm2/s)
AeroShell Oil Sport Plus 4 10w40
94.2cSt @40C
14.4cSt @100C
Aeroshell Oil 15W 50 is a semi-synthetic multigrade ashless dispersant
oil blend of a mineral oil and synthetic hydrocarbons with an additive
package.
AeroShell Oil 15W-50
140cSt @40C
19.6cSt @100C
AeroShell (straight mineral) They are blended from selected high
viscosity index base stocks and contain a minimum quantity of
additives.
AeroShell Oil 65 (30grade)
90.9cSt @40C
11.8cSt @100C
AeroShell Oil 80 (40grade)
150cSt @40C
14.6cSt @100C
AeroShell Oil 100 (50grade)
230cSt @40C
19.7cSt @100C
AeroShell Oil 120 (60grade)
380cSt @ 40C
24.8 @ 100C
AeroShell 'W' ashless dispersant with non-metallic dispersant additives.
AeroShell Oil W65 (30grade)
91cSt @ 40C
12cSt @ 100C
AeroShell Oil W80 (40grade)
113cSt @ 40C
14.0cSt @ 100C
AeroShell Oil W80 Plus and W100 Plus are single-grade ashless
dispersant with the extra anti-wear and anti-corrosion additive
package of AeroShell Oil 15W-50.
AeroShell Oil W80 Plus (40grade)
113cSt @ 40C
14.0cSt @ 100C
AeroShell Oil W100 (50grade)
200cSt @ 40C
20.2cSt @ 100C
AeroShell Oil W100 Plus (50grade)
195cSt @ 40C
19.9cSt @ 100C
AeroShell Oil W120 (60grade)
270cSt @ 40C
24.8cSt @ 100C
Semi-Synthetic oils use a blend of mineral oil and a synthetic
hydrocarbon oil.
Due to the naturally high viscosity index of the synthetic oil - it's
viscosity changes less with temperature when compared to mineral oils
- there is no need to add a viscosity index improver.
Another advantage of using a semi-synthetic oil is that the synthetic
component of the oil has a higher thermal stability and therefore
degrades at a slower rate than mineral oils. This leads to the oil
both performing as an effective lubricant for longer and also
producing less acidic compounds, the byproducts of oil degradation,
which in turn reduces the risk of acid attack in the engine.
AeroShell Oil W 15W-50 is virtually the only semi-synthetic aviation
mutigrade on the market at present, and has given years of excellent
performance throughout the world.
The obvious question is, "Why not produce a fully synthetic oil if it
so good?".
The answer is simply that, unlike automotive engines, aviation engines
run on 100LL (Avgas) which contains a much higher concentration of
Lead than ordinary 4 star automotive fuel. The combustion of this fuel
inevitably leads to Lead getting into the oil in the crankcase where
it could form Lead deposits, and may lead to subsequent failure.
However if the oil has a mineral oil content to it (either a fully
mineral oil, or a semi-synthetic) then the Lead is dissolved by the
oil, whereas a fully synthetic oil does not have the capacity to do
this.
One of the advantages of using AeroShell Oil W 15W-50 comes when the
aircraft is not flown frequently as the oil contains both a corrosion
inhibitor and an anti scuffing additive (LW16702) to help the
occasional flyer.
If the aircraft cannot be flown with the frequency required to keep
the oil 'dry' (a minimum of 1/2 hour cruise every 2 weeks), the
corrosion inhibitor will suppress the formation of any corrosion
during periods of inactivity, which would otherwise form due to the
action of acids and water.
Furthermore, once the aircraft engine is started up after being
inactive, the anti scuffing additive will have coated all the internal
metallic surfaces with a molecular layer so that metal to metal
contact is prevented if there is no oil present. This is particularly
important during the first few seconds after start up as the oil pump
will not pump oil to all the extremities of the engine immediately.
Again not all oils contain these additives, but combined with the
natural advantages of using a semi-synthetic oil, we believe that
AeroShell Oil W 15W-50 represents the premium quality choice in the
aviation piston engine oil market.
Phillips
20W 50 Phillips Anti Rust
176 cSt @ 40°C
19.1 cSt @ 100°C;
Cold Cranking Viscosity, cP @ -15°C 8865
100AD Phillips Type A
204 cSt @ 40°C
20.2 cSt @ 100°C
120AD Phillips Type A
257 cSt @ 40°C
23.4 cSt @ 100°C
20W 50 Phillips Type M
166 cSt @ 40°C
19.5 cSt @ 100°C;
Type A 100AW, has a stated additive, which is the Lycoming additive.
100AW Phillips Victory
189 cSt @ 40°C
19.5 cSt @ 100°C
X/C mineral basestock
25W 60 Phillips X/C
245 cSt @ 40°C
24.8 cSt @ 100°C
Cold Cranking Viscosity @-10ºC cP 8200
20W 50 Phillips X/C
159 cSt @ 40°C
19.8 cSt @ 100°C
Cold Cranking Viscosity @-10ºC cP 5200