Mobil SHC Aware™ ST Series stern tube oil
Mobil SHC™ Aware™ ST Series meet Vessel General Permit (VGP) requirements for environmentally acceptable lubricants* and is engineered to deliver optimal performance in marine stern tube systems, fin stabilisers and controllable pitch propeller (CPP) systems.
Mobil SHC™ Aware™ ST 100 and Mobil SHC™ Aware™ ST 220 may help:
- Maximise service life of machinery and reduce maintenance between dry docks
- Provide outstanding lubrication, including rust and corrosion protection, even with up to 20 percent water content
- Ensure compatibility with most common elastomers and seals
- Provide good miscibility with commonly used mineral products
Their lubricating film resists water, providing system protection even under severe operating conditions – which helps to extend component life, minimise unscheduled downtime, and lower potential remediation and cleanup costs caused by spills or leakage.
*Environmentally acceptable lubricants are defined in the United States Environmental Protection Agency’s (EPA) 2013 Vessel General Permit (VGP) as lubricants that are biodegradable, minimally toxic and non-bioaccumulative.
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Data Sheet
Product data sheet (PDS) 
Safety data sheet (SDS) Product Information
768.378 KB/pdf
Technical resources
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Learn about five different circumstances related to switching and mixing ExxonMobil marine lubricants.
Features and Benefits
- Meets US EPA 2013 Vessel General Permit requirements for environmentally acceptable lubricants
- Can safely run with up to 20% water content emulsion
- Excellent load carrying capability and corrosion protection
- Compatible with most typical mineral oils used for stern tubes
- Good elastomer compatibility, it works well with many of the same elastomers used with conventional mineral oils
- Mobil SHC Aware ST 220 can provide effective leak control when seal damage occurs
Specifications and Approvals
| Mobil SHC Aware ST Series meets or exceeds the following regulatory requirements: | 100 | 220 |
| US EPA 2013 Vessel General Permit | X | X |
Applications
- Marine stern tube systems, fin stabilizers, and certain controllable pitch propeller systems where spills or leakage could result in adverse environment impact
- In systems where readily biodegradable and minimally toxic fluids may be required
- Marine and mobile equipment operating in environmentally sensitive areas
- Circulation systems operating under mild to moderate service conditions
Typical Properties
| Mobil SHC Aware ST Series | ||
| ISO Viscosity Grade | 100 | 220 |
| Viscosity, ASTM D 445 | ||
| cSt @ 40ºC | 100 | 220 |
| cSt @ 100ºC | 19.3 | 33.3 |
| Viscosity Index, ASTM D 2270 | 205 | 200 |
| Density @ 15ºC, ASTM D4052, g/ml | 0.922 | 0.932 |
| FZG Gear Test, A/8.3/90, DIN ISO 14635-1, Fail Load Stage | 10 | 11 |
| Rust Characteristics, procedure B, ASTM D 665 | Pass | Pass |
| Pour Point, ASTM D 97, ºC | -24 | -12 |
| Flash Point, (min) ASTM D 92, ºC | 170 | 163 |
| Biodegradability, CO2 Evolution, OECD 301 B, % | >60 | >60 |
| Acute Algal Toxicity 72h EC50, OECD 201, mg/l | >1000 | >1000 |
| Acute Daphnia Toxicity 48h EC50, OECD 202, mg/l | >1000 | >1000 |
| Acute Fish Toxicity 96h LC50, OECD 203, mg/l | >1000 | >1000 |
| Bioaccumulation, OECD 117,Partition Coefficient, log KOW | <3 | <3 |
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