Mobilgard L540
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详细内容
Mobilgard L540
Diesel Engine Cylinder Oil
Product Description
Mobilgard L540 by ExxonMobil is a superior quality, extra high performance marine diesel engine cylinder oil. This unique formulation has been specifically developed for engines running in a low sulphur heavy fuel oil (HFO) environment. This cylinder lubricant provides maximum protection from adhesive ａnd corrosive wear at the higher operating temperatures ａnd pressures of today＇s modern crosshead engines, for maximum reliability. It employs additives with greater therrmal stability ａnd superior acid-corrosion protection. It has an optimum viscosity of over 20 cSt. at 100ºC ａnd low volatility for best lubricant distribution ａnd film retention. Through the use of unique formulation technology, the higher viscosity is attained with little or no use of thermally less stable, deposit-producing bright stock. Advanced technology at the 40 TBN alkalinity level in Mobilgard L540 has demonstrated excellent ring ａnd liner wear protection ａnd cleanliness under sustained operation with fuel sulphur levels from less than 0.3% up to 1.5%.
Features ａnd Benefits
Mobilgard L540 cylinder oil offers the following features ａnd potential benefits:
| Features | Advantages ａnd Potential Benefits |
|---|---|
| Excellent thermal ａnd oxidation stability | Reduced deposits ａnd sludge formation Extended oil life Cleaner engine reduces lay-up time required for overhauls |
| Exceptional antiwear properties | Reduced liner ａnd ring wear Excellent anti-scuffing control |
| Outstanding detergency capability | Superior piston ａnd liner cleanliness increases combustion efficiency ａnd extends periods between piston overhauls |
| High Viscosity Index ａnd stable basestocks | Reduced cylinder oil consumption |
Applications
Mobilgard L540 has been developed for marine crosshead engines with increased power ａnd fuel efficiency. Such engines exhibit higher temperatures ａnd pressures in the cylinder, which reduce the lubricant＇s viscosity ａnd increase the loads which it must withstand. Longer piston strokes have greatly increased the amount of surface to be protected ａnd the amount of time the lubricant must withstand the severe cylinder temperatures ａnd corrosive sulphur acids. Mobilgard L540 has also demonstrated superior performance in earlier engine designs.
To ensure achieving the maximum equipment life possible, particular attention should be paid to the manufacturer＇s special recommendations regarding the running-in of new rings ａnd liners.
Mobilgard L540 was specially formulated for use in applications with fuel sulphur levels ranging from less than 0.3% up to 1.5%. Applications where the sulphur level is above 1.5% require special consideration ａnd should be discussed with your ExxonMobil representative.
Appropriate feed rates should be verified in all cases by through-the-ports inspection of liners to ensure adequate oil film.
Typical Properties
| SAE Grade | 50 |
|---|---|
| Specific Gravity at 15ºC | 0.917 |
| Flash Point, ºC, ASTM D 92 | 264 |
| Pour Point, ºC, ASTM D 97 | -6 |
| Viscosity, ASTM D 445 | |
| cSt, at 40ºC | 236 |
| cSt, at 100ºC | 21 |
| Viscosity Index, ASTM D 2270 | 105 |
| TBN, mg KOH/g, ASTM D 2896 | 40 |
Health ａnd Safety
Based on available information, this product is not expected to produce adverse effects on health when used for the intended application, following the recommendations provided in the Material Safety Data Sheet (MSDS). MSDSs are available upon request through your sales contract office, or via the Internet on http://www.exxonmobil.com. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.
The ExxonMobil logotype ａnd Mobilgard are trademarks of Exxon Mobil Corporation, or one of its subsidiaries.
Copyright © 2001-2013 Exxon Mobil Corporation. All rights reserved..
