ILMA Compoundings - July 2019 - 30

Due to the test development challenges, the
timeline for delivering the new ILSAC GF-6
performance standard continued to be extended
beyond the original timeline projection. Each
engine test had its own 'subplot' with both accomplishments and setbacks."
of the engine tests, with the exception
of the Sequence VIII, were new for
ILSAC GF-6. This is shown in Table 1.
The last time there was this magnitude of change in new engine test
development was during the transition
from ILSAC GF-2 to ILSAC GF-3
in 2001. Due to the test development
challenges, the timeline for delivering
the new ILSAC GF-6 performance
standard continued to be extended
beyond the original timeline projection. Each engine test had its own
"subplot" with both accomplishments
and setbacks. Test selection, test
development, operating conditions,
repeatability of results and the ability
to measure oil discrimination consistent with test deliverables were
important features and milestones
with each new engine test. This further
complicated the road map such that at
times it represented more of a mazelike puzzle. However, there was always
an end in sight, and through the

cooperative efforts of the automotive
manufacturers, the oil marketers, the
additive companies and the engine test
laboratories, that end was successfully
accomplished.
With all of the new testing requirements for ILSAC GF-6, it is not
surprising that the additive chemistry
and base stocks required to formulate
these new products would also change.
One of the technology themes of the
ILSAC specifications prior to ILSAC
GF-6 was the convergence on the use
of overbased calcium (Ca) detergents.
The reason for this convergence was
the observation that calcium-based
detergents generally showed lower
boundary friction and, consequently,
improved fuel economy when used
in combination with either organic
friction modifiers or metallic-type
friction modifiers.
The widespread implementation
of gasoline direct-injected engines,
however, created concerns for certain

Table 1: Engine Test Changes Between ILSAC GF-5 and ILSAC GF-6
ILSAC GF-5

ILSAC GF-6

Parameter

Sequence IIIG

Sequence IIIH

Oxidation and Deposit Control

Sequence IVA

Sequence IVB

Valve Train Wear

Sequence VG

Sequence VH

Sludge and Deposit Control

Sequence VID

Sequence VIE

Fuel Economy

Sequence VIII

Sequence VIII

Bearing Corrosion and Shear Stability

None

Sequence VIF

Fuel Economy (SAE 0W-16 oils)

None

Sequence IX

Low-Speed Pre-Ignition

None

Sequence X

Timing Chain Wear

30

JULY 2019

| COMPOUNDINGS | ILMA.ORG

OEMs who encountered field issues
with a feature known as LSPI. Early
results indicated that the frequency
of LSPI events could be minimized
through the use of overbased magnesium (Mg) containing detergent
systems. It is believed that many additive suppliers subsequently adjusted
their detergent offerings to a mixed
Ca/Mg system in order to minimize
LSPI (i.e., the Mg component) while
retaining the ability to improve fuel
economy through reduced boundary
friction (i.e., the Ca component).
The Sequence IVB is the replacement
low-speed valve train wear test for
ILSAC GF-6. The previous low-speed
valve train wear test was the Sequence
IVA. The Sequence IVA had very
specific additive requirements. Secondary ZDDP was preferred over primary
ZDDP in preventing wear. There was
synergy between ZDDP and various
organic and metallic-type friction
modifiers in wear reduction. The
additive appetite for the new test is not
necessarily the same as the old test.
The replacement for the Sequence
IIIG is the Sequence IIIH. Toward the
end of the life of the Sequence IIIG,
the test became difficult to predict due
to the declining number of engine parts
and quality consistency. The Sequence
III originally had a valve train wear
component, but this fell by the wayside
with the adoption of the Sequence IIIF
during ILSAC GF-3 development. In
addition to evaluation of ring sticking,
the Sequence III test evaluated the
oxidative life of the lubricant and the
ability of the lubricant to protect the
engine from deposit formation. 
The oxidative life of an engine oil
was measured by the amount of time
it takes until the ability of the additive
system to prevent the exponential
increase in oil viscosity ceases to
function. There were many additive
options available to reduce viscosity
growth, including ZDDP, aminic
type antioxidants, sulfur containing


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ILMA Compoundings - July 2019

Table of Contents for the Digital Edition of ILMA Compoundings - July 2019

LETTER FROM THE CEO
INSIDE ILMA
WHAT’S COMING UP
NEW MEMBERS
INDUSTRY RUNDOWN
In the Know
International Insight
Market Report
PROTECTING AND ENFORCING PRODUCT PATENTS
GOING GLOBAL
LESSONS LEARNED ON THE ROAD TO ILSAC GF-6
BUSINESS HUB
COUNSEL COMPOUND
WASHINGTON LANDSCAPE
IN NETWORK
Member Connections
PORTRAIT
ILMA Compoundings - July 2019 - Cover1
ILMA Compoundings - July 2019 - Cover2
ILMA Compoundings - July 2019 - 1
ILMA Compoundings - July 2019 - 2
ILMA Compoundings - July 2019 - LETTER FROM THE CEO
ILMA Compoundings - July 2019 - INSIDE ILMA
ILMA Compoundings - July 2019 - 5
ILMA Compoundings - July 2019 - 6
ILMA Compoundings - July 2019 - 7
ILMA Compoundings - July 2019 - WHAT’S COMING UP
ILMA Compoundings - July 2019 - 9
ILMA Compoundings - July 2019 - 10
ILMA Compoundings - July 2019 - NEW MEMBERS
ILMA Compoundings - July 2019 - INDUSTRY RUNDOWN
ILMA Compoundings - July 2019 - In the Know
ILMA Compoundings - July 2019 - International Insight
ILMA Compoundings - July 2019 - 15
ILMA Compoundings - July 2019 - Market Report
ILMA Compoundings - July 2019 - 17
ILMA Compoundings - July 2019 - PROTECTING AND ENFORCING PRODUCT PATENTS
ILMA Compoundings - July 2019 - 19
ILMA Compoundings - July 2019 - 20
ILMA Compoundings - July 2019 - 21
ILMA Compoundings - July 2019 - 22
ILMA Compoundings - July 2019 - 23
ILMA Compoundings - July 2019 - GOING GLOBAL
ILMA Compoundings - July 2019 - 25
ILMA Compoundings - July 2019 - 26
ILMA Compoundings - July 2019 - 27
ILMA Compoundings - July 2019 - LESSONS LEARNED ON THE ROAD TO ILSAC GF-6
ILMA Compoundings - July 2019 - 29
ILMA Compoundings - July 2019 - 30
ILMA Compoundings - July 2019 - 31
ILMA Compoundings - July 2019 - BUSINESS HUB
ILMA Compoundings - July 2019 - 33
ILMA Compoundings - July 2019 - COUNSEL COMPOUND
ILMA Compoundings - July 2019 - 35
ILMA Compoundings - July 2019 - WASHINGTON LANDSCAPE
ILMA Compoundings - July 2019 - 37
ILMA Compoundings - July 2019 - Member Connections
ILMA Compoundings - July 2019 - 39
ILMA Compoundings - July 2019 - PORTRAIT
ILMA Compoundings - July 2019 - Cover3
ILMA Compoundings - July 2019 - Cover4
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