Mobil SHC Aware™ ST Series stern tube oil

Does your stern tube oil meet vessel general permit requirements?

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Mobil SHC™ Aware™ lubricants

Learn about our range of environmentally acceptable marine lubricants, which provide optimal protection for shipboard equipment affected by the 2013 Vessel General Permit.

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Data sheets

Cruise and Ferry
Specialized Shipping
Inland and Coastal
Deep Sea Shipping Industry
Short Sea Shipping
Offshore Supply Vessels
Environmentally Acceptable Lubricants EAL
Vessel General Permit VGP
Corrosion protection

Product Information

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


  • 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

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

Typical Properties

Mobil SHC Aware ST Series
ISO Viscosity Grade 100 220
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
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
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