Performance profile

Mobil Pegasus™ 605 Ultra 40 High-performance gas engine oil

Key benefits

Enhanced equipment productivity and minimized maintenance downtime and expense due to exceptionally long drain intervals

Extraordinary detergent-dispersant system helps keep engines clean despite contaminants common to landfill and biomass gasses

Minimized wear on components and scuffing on liners

1Up to

hou

,rs bet

000ween oil drains

Clean performanceAfter 11,899 operating hours on Mobil Pegasus 605 Ultra 40 oil (35,519 total engine hours), critical components were removed and evaluated.

Power cylinder assembly Connecting rod bearing

Power cylinder assemblies showed minimal carbon deposits, varnish and lacquer in piston lands and grooves.

Connecting rod bearings exhibited less than 5 percent overlay removed and 0 percent exposed copper, demonstrating excellent wear and corrosion protection in the presence of corrosive contaminants in the fuel gas.

Mobil Pegasus™ 605 Ultra 40 oil is designed to provide optimum performance in high-speed, four-cycle engines operating on landfill and biomass gas. Through a balanced formulation, this advanced oil can help:• Control the formation of carbon and varnish deposits

• Enhance spark plug performance

• Protect valve seats and faces and minimize power loss from detonation

Mobil Pegasus™ 605 Ultra 40

Exceptional durabilityIn comparison tests performed in GE Waukesha APG 1000 gas engines, Mobil Pegasus 605 Ultra 40 engine oil demonstrates equivalent viscosity control and superior Total Acid Number (TAN) control to Mobil Pegasus™ 605 oil at double the oil drain intervals (ODI) — 1,000 hours compared to 500 hours.

These tests show outstanding durability, allowing operators to extend drain intervals, which can help reduce maintenance downtime and costs while increasing engine availability and production.

100°C Viscosity

cSt

18

17

16

15

14

13

12

0 5,000 10,000 15,000 20,000Hours

Engine 1 – Mobil Pegasus™ 605 Engine 2 – Mobil Pegasus™ 605 Ultra 40 Limit

TAN

mg

KOH

/g

7

6

5

4

3

2

1

0

0 5,000 10,000 15,000 20,000

Hours

Typical properties*

Mobil Pegasus™ 605 Ultra 40

Viscosity, ASTM D445 40

cSt @ 40ºC 137.5

cSt @ 100ºC 15.0

Viscosity Index, ASTM D2270 110

Sulphated Ash, wt%, ASTM D874 0.6

TBN #, mg KOH/g, ASTM D2896 5.3

Pour Point, ºC, ASTM D97 -21

Flash Point, ºC, ASTM D92 268

Density @ 15.6ºC, ASTM D4052, kg/L 0.85

Safety Environmental Care† ProductivityLong drain intervals minimize the Use of landfill gas reduces Enhanced engine durability and need for maintenance and the methane emissions and lessens deposit control, as well as long risks associated with employee- dependence on fossil fuels. drain intervals, minimize need for equipment interaction. Mobil Pegasus™ 605 Ultra 40 maintenance downtime, which

engine oil supports this use helps boost engine availability for through capabilities that help peak production. minimize operational costs and optimize engine performance.

*Typical properties are typical of those obtained with normal production tolerance and do not constitute a specification. Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations. The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit exxonmobil.com. ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.

†Visit mobilindustrial.com to learn how certain Mobil-branded lubricants may provide benefits to help minimize environmental impact. Actual benefits will depend upon product selected, operating conditions and applications.

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