SG Series Extreme Pressure Gear Oils
 SG Series Extreme Pressure Gear Oils

AMSOIL SG Series Extreme Pressure Gear Oils are made from shear-stable, high-quality synthetic base oils and are fortified with additives that deliver high performance in industrial gear applications. These oils are designed to reduce maintenance costs by extending equipment life, extending drain intervals, and protecting against wear, pitting and rust.

Package sizes include:

5-Gallon Pail
55-Gallon Drum
275-Gallon Totes

Product Code: sg_series • Brand: AMSOIL

To order SG Series Extreme Pressure Gear Oils
please email or call us. This is a special order item.

MSDS Data Sheet

Product Details Tech Data Reviews & Rating

Product Applications
AMSOIL Synthetic SG Series Extreme Pressure Gear Oils are recommended for industrial applications operating under heavy loads and shock conditions and specifying an extreme-pressure lubricant. This includes, but is not limited to, enclosed industrial spur, bevel, herringbone, helical and worm gears**, chain drives, sprockets and most metal-on-metal systems requiring extreme-pressure additives.

These lubricants are excellent for use in severe operating conditions and their synthetic properties make them good all-season lubricants.

The SG Series Gear Oils meet the AGMA ratings for synthetic gear oils and EP gear oils and are recommended for use in applications specifying these standards. Although AMSOIL SG Series Oils are compatible with mineral oil based lubricants, for optimum performance it is recommended that the system be thoroughly drained and, if warranted, cleaned.

The ability of AMSOIL SG Series Gear Oils to extend drain intervals is subject to operating conditions and maintenance practices. Monitoring by oil analysis is recommended.


*AMSOIL SG Series Gear Oils, as well as other synthetic or mineral based oils, are not compatible with polyglycol-type gear oils. Thorough flushing prior to changeover is required.

**AMSOIL SG Series Gear Oils are not recommended for use in worm gear applications or applications containing yellow metal and operating at or above 200°F (93°C). Also not recommended for use in other applications operating at or above 250°F (171°C). For such applications, please consult your AMSOIL Dealer or AMSOIL INC.

AMSOIL SG Gear Oils are not recommended for automotive hypoid gear applications.

Product Application Specs

• U.S. Steel 224
• AGMA 250.04
• AGMA 9005-E02
• DIN 51517 Part 3
• David Brown ET 33/80, 51, 53 and 101
• Cincinnati Milacron P-35, P-59, P-63, P-74, P-76, P-77 and P-78

Product Description
AMSOIL SG Series Extreme Pressure Gear Oils are made from shear-stable, high-quality synthetic base oils and are fortified with additives that deliver high performance in industrial gear applications. These oils are designed to reduce maintenance costs by extending equipment life, extending drain intervals, and protecting against wear, pitting and rust.

Base Stock Technology
AMSOIL SG Oils are compatible with mineral gear oils, synthetic gear oils*, and seals—making them easy to use.They preserve new seals, prevent leaks, and help rejuvenate old, brittle seals.

AMSOIL SG synthetic base stocks are inherently resistant to oxidation, helping provide long life. The naturally high viscosity indices, low pour points, and lack of paraffins (wax) make these lubricants ideal for use in wide operating temperature ranges. At low operating temperatures, equipment starts easier, is not starved of lubrication from channeling and product solidification, and the need for sump heaters is reduced. At higher operating temperatures, AMSOIL SG base oils resist the degradative effects of oxidation that cause poor lubricant performance, and they maintain an optimal lubricating film between parts.

The base oils are also hydrolytically stable and they readily separate from water. This prevents unwanted oil/water emulsions that have poor lubricating properties, and it eases water removal from the sump.

Additive Performance
AMSOIL SG Oils are fully formulated with sulphur/phosphorous extreme pressure additives, antioxidants, rust inhibitors, and antifoam agents. The thermally stable, extreme-pressure additive system forms a hard, iron-sulfide coating on metal components. This iron-sulfide coating prevents metal-to-metal contact under boundary lubrication conditions, reduces friction and protects components against shock loading and wear. The antioxidants increase the oxidation resistance of the synthetic base oils for long, clean lubricant performance.These oils protect against rust from water or process contaminants and prevent foaming, ensuring proper lubrication.

AMSOIL industrial lubricants are formulated to meet or exceed accepted industry specifications. AMSOIL warrants that the use of its lubricants will not cause mechanical damage to any mechanically sound equipment when AMSOIL products are used in full compliance with the company’s recommendations. However, the purchaser of these lubricants is responsible for determining if these specifications are adequate and proper for the intended application. The AMSOIL warranty is limited to lubricant performance consistent with indicated specifications. No additional warranty, expressed or implied, can be made.

AMSOIL products are available in 5-gallon pails, 55- gallon drums, 275-gallon totes and bulk quantities. For 275- gallon totes, please allow two to four weeks for delivery. AMSOIL Industrial Lubricants are stocked in Superior, Wisconsin and in select regional distribution centers throughout the United States and Canada. AMSOIL will stock additional quantities of lubricants or special order products based on customer requests and regional demands.

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL sg_series.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Synthetic SG SERIES Gear Oil SGK
ISO 100
ISO 150
ISO 220
ISO 320
ISO 460
ISO 680
AGMA EP Gear 3 EP 4 EP 5 EP 6 EP 7 EP 8 EP
AGMA Synthetic Gear 3S 4S 5S 6S 7S 8S
ISO VG ASTM D-2422 100 150 220 320 460 680
VK 100°C ASTM D-445 14.4 19.3 25.5 32.8 43.3 55.4
VK 40°C ASTM D-445 104.7 156.8 228.6 329.7 477.4 697.5
Viscosity Index ASTM D-2270 140 141 142 140 141 140
SPGR ASTM D-1298 0.8686 0.8740 0.8789 0.8800 0.8984 0.8894
Density ASTM D-1298 7.233 7.278 7.318 7.328 7.481 7.406
Flash Point, °C (°F) ASTM D-92 242 (468) 244 (471) 248 (478) 250 (482) 248 (478) 250 (482)
Fire Point, °C (°F) ASTM D-92 268 (514) 270 (518) 274 (525) 280 (536) 276 (529) 278 (532)
Pour Point, °C (°F) ASTM D-97 -43 (-45) -40 (-40) -38 (-36) -34 (-29) -31 (-24) -30 (-22)
NOACK ASTM D-5800 4.1% 4.0% 3.4% 3.2% 2.7% 2.7%
4-Ball Wear Test, ASTM D-4172
(40Kg, 1200 rpm, 75°C, 60 min.)
0.40 0.40 0.40 0.40 0.40 0.40
Copper Strip Corrosion Test ASTM D-130 121°C (250°F), 3 hrs. 1B 1B 1B 1B 1B 1B
Timken EP Load ASTM D-2782 80 lbs 80 lbs 80 lbs 80 lbs 80 lbs 80 lbs
4-Ball EP, ASTM D2783
- Weld Point, Kg
- Load Wear Index, Kgf
FZG, Passed Stage ASTM D5182 12 12 12 12 12 12
Channel Point @ -40°C (-40°F) - FTM 3456.2 Non-Channeling (All ISO Grades)

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