| Customers report that Amsoil synthetic lubricants actually provides over 20 degree engine temperature drop compared to other syntheticsor fossil lubricants in Harley engines. Outstanding protection and longevity, proven #1. |
WHY HARLEY OWNERS CHOOSE AMSOIL
Wear Test Comparison - AMSOIL vs. Harley Screamin' Eagle
The recent introduction of Screaming' Eagle® Synthetic Lubricant by Harley-Davidson® indicates the
Motor Company has finally recognized the benefits of running synthetic motorcycle oil in their
air-cooled engines. After years of advising dealers and customers to avoid using synthetic oils in their
bikes, it's natural to wonder why the company is suddenly marketing one.
For the past 20 years, Harley-Davidson® has claimed its petroleum-based Genuine H-D Oil is best for
the "unique requirements of Harley-Davidson® air-cooled V-twin engines." However, laboratory
testing has consistently revealed that Genuine H-D Oil does not provide the best protection possible for
Harley-Davidson® engines. In fact, Four-Ball Wear Tests show Harley- Davidson® 20W-50
Motorcycle Oil leaves a wear scar nearly 80 percent larger than that left by AMSOIL Synthetic
20W-50 Motorcycle Oil.
Four-Ball Wear Test (ASTM D4172), 40kg pressure @ 150 degrees C, 1800 rpm for 1 hour duration
April 2003 test results
The Four-Ball Wear Test is the industry's standard test method for measuring the wear preventive
characteristics of a lubricant. Placed in a bath of the test lubricant, three fixed steel balls are put into
contact with a fourth ball in rotating contact at preset test conditions. Lubricant wear protection
properties are measured by comparing the average wear scars on the three fixed balls. The smaller the
average wear scar, the better the protection.
One of the major benefits of running a synthetic motorcycle oil is its resistance to oxidation and thermal
degradation, which inhibit the formation of sludge and deposits that contribute to increased wear. In the
past, Harley-Davidson® has defended use of its Genuine H-D Oil by arguing that oil breakdown in
extreme heat is a non-issue because extreme heat conditions are not normally faced by motorcycle
engines, while the superior cold-temperature benefits of synthetics also don't apply to Harleys.
The fact is, engine oil in Harley-Davidson® motorcycles is subject to very high temperatures. Being
air-cooled, Harley-Davidson® engines get especially hot while idling in traffic, commonly reaching
temperatures up to 240 degrees Fahrenheit. As heat and oxidation increase, so does viscosity, adversely
affecting the lubricating qualities of the oil and increasing wear.
The water, soot and acid byproducts of combustion also contribute to deposit formation.
Harley-Davidson® has stressed the importance of regular oil changes in order to remove these
contaminants. Of course, promoting regular oil changes is also a good way to promote using
petroleum-based Genuine H-D Oil. High-quality synthetic oils formulated with high-performance
additives effectively withstand such contaminants, allowing motorcyclists to safely extend drain
intervals.
In support of their about-face and the introduction of a synthetic oil, Harley maintains that "the Motor
Company has never supported the use of synthetic products in our vehicles because there has never
been any test validations completed on the numerous formulations in HD/Buell motorcycles. This
product has been exclusively designed for Harley-Davidson® and is the only synthetic product
TESTED and CERTIFIED by Harley-Davidson® engineering for use in HD/Buell motorcycles."
Although this is necessary marketing hype, Harley-Davidson® V-twin air-cooled engines are not unique
in their lubrication requirements and do not require a special Harley-only fluid (see letter from
Harley-Davidson). There is nothing about Screaming' Eagle® Synthetic Motorcycle Oil that sets it
apart from, or makes it better than, many other synthetic motorcycle oil formulations, except that
Harley-Davidson® is marketing it and directly profiting from the sales.
According to Harley-Davidson®, one of the unique benefits offered by Screamin' Eagle® Synthetic
Motorcycle Oil is its versatility. For the first time the company is recommending an oil that can be used
in the engines, primary chaincases and transmissions of most Harley-Davidson® motorcycles, including
Evolution XL, Evolution 1340, Twin Cam 88 and 88B, Revolution and Buell models. This feature,
however, is not unique. AMSOIL 20W-50 Synthetic Motorcycle Oil may also be used in the engines,
primary chaincases and transmissions of these applications, providing superior lubricating protection in
each component.
How does Screamin' Eagle® Synthetic Motorcycle Oil measure up to AMSOIL in wear protection?
Four-Ball Wear Test results indicate that AMSOIL Synthetic Motorcycle Oil still provides the best
protection possible for motorcycles. In fact, Screamin' Eagle® Synthetic Motorcycle Oil leaves a wear
scar nearly 80 percent larger than AMSOIL 20W-50 Synthetic Motorcycle Oil.
Not only does AMSOIL Synthetic Motorcycle Oil offer greater wear protection than Screamin' Eagle®
Synthetic Motorcycle Oil, it also delivers greater value. Suggested retail price of Screamin' Eagle® is
nearly $2 a quart higher than AMSOIL 20W-50 Motorcycle Oil. And because AMSOIL Synthetic
Motorcycle Oil may be used for extended drain intervals of up to twice the manufacturer's suggested
interval, while Screamin' Eagle® is recommended for standard drain intervals, AMSOIL customers
realize additional savings.
Harley-Davidson® claims Screamin' Eagle® Synthetic Motorcycle Oil has been "exclusively designed"
for use in their motorcycles, pointing to extensive bench testing and over 230,000 miles of durability
testing to back it up. AMSOIL INC. has 30 years of experience providing superior lubricating
protection for all brands of motorcycles, and AMSOIL Synthetic Motorcycle Oils have been tested in
millions of over-the-road miles. Testimonials from countless motorcyclists further demonstrate the
superiority of AMSOIL Synthetic
Motorcycle Oils.
Formulated with top-of-the-line synthetic base stocks and high-temperature deposit control additives,
AMSOIL Synthetic Motorcycle Oils provide superior protection and performance for motorcycles in all
operating conditions. AMSOIL Motorcycle Oils effectively withstand oxidation and thermal
degradation, keep wear to an absolute minimum, hold contaminants in suspension and keep engines
running cool and clean.
AMSOIL Synthetic Motorcycle Oils
Reduce operating temperatures
Keep engines clean and deposit-free
Provide maximum protection against wear
Formulated without friction modifiers for smooth performance
Saves money with extended drain intervals of up to
two times the manufacturers' recommendations
Wear Test Comparison - AMSOIL vs. Harley Screamin' Eagle
The recent introduction of Screaming' Eagle® Synthetic Lubricant by Harley-Davidson® indicates the
Motor Company has finally recognized the benefits of running synthetic motorcycle oil in their
air-cooled engines. After years of advising dealers and customers to avoid using synthetic oils in their
bikes, it's natural to wonder why the company is suddenly marketing one.
For the past 20 years, Harley-Davidson® has claimed its petroleum-based Genuine H-D Oil is best for
the "unique requirements of Harley-Davidson® air-cooled V-twin engines." However, laboratory
testing has consistently revealed that Genuine H-D Oil does not provide the best protection possible for
Harley-Davidson® engines. In fact, Four-Ball Wear Tests show Harley- Davidson® 20W-50
Motorcycle Oil leaves a wear scar nearly 80 percent larger than that left by AMSOIL Synthetic
20W-50 Motorcycle Oil.
Four-Ball Wear Test (ASTM D4172), 40kg pressure @ 150 degrees C, 1800 rpm for 1 hour duration
April 2003 test results
The Four-Ball Wear Test is the industry's standard test method for measuring the wear preventive
characteristics of a lubricant. Placed in a bath of the test lubricant, three fixed steel balls are put into
contact with a fourth ball in rotating contact at preset test conditions. Lubricant wear protection
properties are measured by comparing the average wear scars on the three fixed balls. The smaller the
average wear scar, the better the protection.
One of the major benefits of running a synthetic motorcycle oil is its resistance to oxidation and thermal
degradation, which inhibit the formation of sludge and deposits that contribute to increased wear. In the
past, Harley-Davidson® has defended use of its Genuine H-D Oil by arguing that oil breakdown in
extreme heat is a non-issue because extreme heat conditions are not normally faced by motorcycle
engines, while the superior cold-temperature benefits of synthetics also don't apply to Harleys.
The fact is, engine oil in Harley-Davidson® motorcycles is subject to very high temperatures. Being
air-cooled, Harley-Davidson® engines get especially hot while idling in traffic, commonly reaching
temperatures up to 240 degrees Fahrenheit. As heat and oxidation increase, so does viscosity, adversely
affecting the lubricating qualities of the oil and increasing wear.
The water, soot and acid byproducts of combustion also contribute to deposit formation.
Harley-Davidson® has stressed the importance of regular oil changes in order to remove these
contaminants. Of course, promoting regular oil changes is also a good way to promote using
petroleum-based Genuine H-D Oil. High-quality synthetic oils formulated with high-performance
additives effectively withstand such contaminants, allowing motorcyclists to safely extend drain
intervals.
In support of their about-face and the introduction of a synthetic oil, Harley maintains that "the Motor
Company has never supported the use of synthetic products in our vehicles because there has never
been any test validations completed on the numerous formulations in HD/Buell motorcycles. This
product has been exclusively designed for Harley-Davidson® and is the only synthetic product
TESTED and CERTIFIED by Harley-Davidson® engineering for use in HD/Buell motorcycles."
Although this is necessary marketing hype, Harley-Davidson® V-twin air-cooled engines are not unique
in their lubrication requirements and do not require a special Harley-only fluid (see letter from
Harley-Davidson). There is nothing about Screaming' Eagle® Synthetic Motorcycle Oil that sets it
apart from, or makes it better than, many other synthetic motorcycle oil formulations, except that
Harley-Davidson® is marketing it and directly profiting from the sales.
According to Harley-Davidson®, one of the unique benefits offered by Screamin' Eagle® Synthetic
Motorcycle Oil is its versatility. For the first time the company is recommending an oil that can be used
in the engines, primary chaincases and transmissions of most Harley-Davidson® motorcycles, including
Evolution XL, Evolution 1340, Twin Cam 88 and 88B, Revolution and Buell models. This feature,
however, is not unique. AMSOIL 20W-50 Synthetic Motorcycle Oil may also be used in the engines,
primary chaincases and transmissions of these applications, providing superior lubricating protection in
each component.
How does Screamin' Eagle® Synthetic Motorcycle Oil measure up to AMSOIL in wear protection?
Four-Ball Wear Test results indicate that AMSOIL Synthetic Motorcycle Oil still provides the best
protection possible for motorcycles. In fact, Screamin' Eagle® Synthetic Motorcycle Oil leaves a wear
scar nearly 80 percent larger than AMSOIL 20W-50 Synthetic Motorcycle Oil.
Not only does AMSOIL Synthetic Motorcycle Oil offer greater wear protection than Screamin' Eagle®
Synthetic Motorcycle Oil, it also delivers greater value. Suggested retail price of Screamin' Eagle® is
nearly $2 a quart higher than AMSOIL 20W-50 Motorcycle Oil. And because AMSOIL Synthetic
Motorcycle Oil may be used for extended drain intervals of up to twice the manufacturer's suggested
interval, while Screamin' Eagle® is recommended for standard drain intervals, AMSOIL customers
realize additional savings.
Harley-Davidson® claims Screamin' Eagle® Synthetic Motorcycle Oil has been "exclusively designed"
for use in their motorcycles, pointing to extensive bench testing and over 230,000 miles of durability
testing to back it up. AMSOIL INC. has 30 years of experience providing superior lubricating
protection for all brands of motorcycles, and AMSOIL Synthetic Motorcycle Oils have been tested in
millions of over-the-road miles. Testimonials from countless motorcyclists further demonstrate the
superiority of AMSOIL Synthetic
Motorcycle Oils.
Formulated with top-of-the-line synthetic base stocks and high-temperature deposit control additives,
AMSOIL Synthetic Motorcycle Oils provide superior protection and performance for motorcycles in all
operating conditions. AMSOIL Motorcycle Oils effectively withstand oxidation and thermal
degradation, keep wear to an absolute minimum, hold contaminants in suspension and keep engines
running cool and clean.
AMSOIL Synthetic Motorcycle Oils
Reduce operating temperatures
Keep engines clean and deposit-free
Provide maximum protection against wear
Formulated without friction modifiers for smooth performance
Saves money with extended drain intervals of up to
two times the manufacturers' recommendations
Note: for the newer Harley Davidson motorcycles, our AMSOIL AMV 20W50 V-Twin oil is
an excellent choice for the crank case, transmission, and primary chain case.
If you choose our previous recommendations (see below), that is an excellent choice also. Either of
these recommendations will provide far superior protection than petroleum lubricants.
Crankcase requiring 20W50 lubricant; Harley Davidson part number 99896-88, use the AMSOIL
High Performance Synthetic 20W-50 Motorcycle Engine Oil, product code AMV.
Transmission: Harley Davidson part numbers 99892-84 and 98853-96, use AMSOIL Series 2000
SAE 75W-90 Synthetic Gear Lube, product code TGR.
Chain Case Oil (primary); Harley Davidson part number 99887-84, use AMSOIL SAE 10W-40
High Performance Synthetic Motorcycle Engine Oil, product code AMF.
The exception is the Sportster. It has two oil reservoirs instead of three and uses the same oil in
both reservoirs. Use AMSOIL 20W50 Synthetic Engine Lubricant in both reservoirs, product code
AMV
Note: The AMSOIL 20w50 (AMV) and 10W40 (AMF) Motorcycle Engine Oils do not contain
friction modifiers and meet Harley Davidson specification for the wet clutch system.
Harley-Davidson forks that recommend type "E" or "B" fork oils, use the AMSOIL Shock
Therapy Suspension Fluid, product code STM
Harley Davidson air filter part numbers, 2900252, 29002-52A, 29002-57, 29002-58, and 29036-56
uses the AMSOIL, product code TS-77
an excellent choice for the crank case, transmission, and primary chain case.
If you choose our previous recommendations (see below), that is an excellent choice also. Either of
these recommendations will provide far superior protection than petroleum lubricants.
Crankcase requiring 20W50 lubricant; Harley Davidson part number 99896-88, use the AMSOIL
High Performance Synthetic 20W-50 Motorcycle Engine Oil, product code AMV.
Transmission: Harley Davidson part numbers 99892-84 and 98853-96, use AMSOIL Series 2000
SAE 75W-90 Synthetic Gear Lube, product code TGR.
Chain Case Oil (primary); Harley Davidson part number 99887-84, use AMSOIL SAE 10W-40
High Performance Synthetic Motorcycle Engine Oil, product code AMF.
The exception is the Sportster. It has two oil reservoirs instead of three and uses the same oil in
both reservoirs. Use AMSOIL 20W50 Synthetic Engine Lubricant in both reservoirs, product code
AMV
Note: The AMSOIL 20w50 (AMV) and 10W40 (AMF) Motorcycle Engine Oils do not contain
friction modifiers and meet Harley Davidson specification for the wet clutch system.
Harley-Davidson forks that recommend type "E" or "B" fork oils, use the AMSOIL Shock
Therapy Suspension Fluid, product code STM
Harley Davidson air filter part numbers, 2900252, 29002-52A, 29002-57, 29002-58, and 29036-56
uses the AMSOIL, product code TS-77
Technical Service Bulletin
TSB: DT-2004-06-02 Rev. 6/28/2004
Date: 06/17/2004
Product Description: All Harley-Davidson Oil Recommendations
Subject: AMSOIL’s Recommended Oils for All Harley-Davidson Models
TSB: DT-2004-06-02 Rev. 6/28/2004
Date: 06/17/2004
Product Description: All Harley-Davidson Oil Recommendations
Subject: AMSOIL’s Recommended Oils for All Harley-Davidson Models
Harley-Davidson has manufactured 9 types of engines from 1929 to the current model. Flathead (1929 -1974), Knuckle
head (1936-1947), Panhead (1948-1965), Shovelhead (1966-1984), Evolution (Blockhead) 1340 (1984 to 1999 ), Big Twins
1450 (2000 to current), Revolution (V– Rods) 2001 to current, Ironhead Sportsters (1957 to 1985) & Evolution Sportsters
1986 to current.
Harley-Davidson recommends SAE 50 or 60 for the engine oil in their Flathead, Knucklehead, Panhead, and Shovelhead.
AMSOIL recommends AHR SAE 60 or AMV 20w-50 engine oil for all these older models. Use AMSOIL TGR or TGO for
the
transmissions. Of these models only the Shovelhead has a chain case that is lubed, and is fed by the engine oil.
In the Evolution 1340, Big Twins 1450, and Revolution V-Rods AMSOIL recommends AMV 20w-50 engine oil in all 3
holes (engine, transmission, and primary chain case). AMSOIL Recommends TGR as an alternative oil for the transmission,
and TGO as an option for older transmissions. New seals are recommended where excessive leaking exists.
Ironhead & Evolution Sportsters use one sump for both transmission and Chain case. AMSOIL recommends AMV for this
common sump.
AMSOIL Cross Reference
Harley-Davidson Part # AMSOIL Product
99816-60 HD Engine Oil AHR SAE 60 Engine Oil
AMV 20w-50 Engine Oil
99892-84 Transmission Lube TGR 75w-90 Gear Lube
TGO 75w-140 Gear Lube
99824-03 Screamin' Eagle Syn 3 AMV 20w-50 Engine Oil
99887-84 Primary Lube AMV 20w-50 Engine Oil
99896-88 Sport-Trans fluid AMV 20w-50 Engine Oil
99880-73 Type B fork oil STM #10 Suspension Fluid
99884-80 Type E fork oil STM #10 Suspension Fluid
head (1936-1947), Panhead (1948-1965), Shovelhead (1966-1984), Evolution (Blockhead) 1340 (1984 to 1999 ), Big Twins
1450 (2000 to current), Revolution (V– Rods) 2001 to current, Ironhead Sportsters (1957 to 1985) & Evolution Sportsters
1986 to current.
Harley-Davidson recommends SAE 50 or 60 for the engine oil in their Flathead, Knucklehead, Panhead, and Shovelhead.
AMSOIL recommends AHR SAE 60 or AMV 20w-50 engine oil for all these older models. Use AMSOIL TGR or TGO for
the
transmissions. Of these models only the Shovelhead has a chain case that is lubed, and is fed by the engine oil.
In the Evolution 1340, Big Twins 1450, and Revolution V-Rods AMSOIL recommends AMV 20w-50 engine oil in all 3
holes (engine, transmission, and primary chain case). AMSOIL Recommends TGR as an alternative oil for the transmission,
and TGO as an option for older transmissions. New seals are recommended where excessive leaking exists.
Ironhead & Evolution Sportsters use one sump for both transmission and Chain case. AMSOIL recommends AMV for this
common sump.
AMSOIL Cross Reference
Harley-Davidson Part # AMSOIL Product
99816-60 HD Engine Oil AHR SAE 60 Engine Oil
AMV 20w-50 Engine Oil
99892-84 Transmission Lube TGR 75w-90 Gear Lube
TGO 75w-140 Gear Lube
99824-03 Screamin' Eagle Syn 3 AMV 20w-50 Engine Oil
99887-84 Primary Lube AMV 20w-50 Engine Oil
99896-88 Sport-Trans fluid AMV 20w-50 Engine Oil
99880-73 Type B fork oil STM #10 Suspension Fluid
99884-80 Type E fork oil STM #10 Suspension Fluid
Key to Harley-Davidson/AMSOIL oil chart
AMSOIL preferred
recommendation; Option 1 Option 2 Option 3
Best Better Good
AMSOIL preferred
recommendation; Option 1 Option 2 Option 3
Best Better Good
Harley-Davidson Models; Best Better Good
Flathead
Engine AHR AMV
Transmission TGR TGO
Knucklehead
Engine AHR AMV
Transmission TGR TGO
Panhead
Engine AHR AMV
Transmission TGR TGO
Shovelhead
Engine AHR AMV
Transmission TGR TGO
Evolution 1340, Big Twins 1450,
Revolution & V-Rods
Engine AMV
Transmission AMV TGR TGO
Primary Chain Case AMV
Ironhead & Evolution Sportsters
Engine, AMV
Transmission AMV
Chain Case AMV
Submitted By: KD Approved By: DRA Approval Date: 06/28/04
Distribution_____ Internal X All Page 1 or 1
Flathead
Engine AHR AMV
Transmission TGR TGO
Knucklehead
Engine AHR AMV
Transmission TGR TGO
Panhead
Engine AHR AMV
Transmission TGR TGO
Shovelhead
Engine AHR AMV
Transmission TGR TGO
Evolution 1340, Big Twins 1450,
Revolution & V-Rods
Engine AMV
Transmission AMV TGR TGO
Primary Chain Case AMV
Ironhead & Evolution Sportsters
Engine, AMV
Transmission AMV
Chain Case AMV
Submitted By: KD Approved By: DRA Approval Date: 06/28/04
Distribution_____ Internal X All Page 1 or 1
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