Mobilgard™ M20 Series diesel engine oils

ExxonMobil’s Mobilgard™ M20 Series diesel engine oils are specifically formulated for use in medium-speed engines using 0.50% and 0.10% sulphur fuels and liquefied natural gas (LNG) due to their low base number formulation of 20 BN.

This formulation helps ensure that deep-sea and coastal vessels with dual-fuel engines can continue using a single lubricant, regardless of their fuel selection. It also helps vessel operators safely and efficiently comply with the International Maritime Organization’s global 0.50% sulphur cap.

Building on the proven effectiveness of the Mobilgard™ M Series, the Mobilgard M20 Series is designed to provide outstanding performance in medium-speed marine engines, even in severe conditions. The first oil in the Mobilgard M20 Series is Mobilgard™ M420 diesel engine oil, which helps:

  • Protect against deposits on under-crowns, crankcases, ring belts and camshafts
  • Extend the life of critical wear surfaces
  • Optimise component life
  • Minimise lubricant consumption
  • Reduce maintenance and operational costs

Mobilgard M320 and M420 oils have received No Objection Letters from leading engine builders, including MAN ES and Wärtsilä.

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Product Information

Mobilgard™ M20 Series is a 20BN engine oil that provides excellent engine cleanliness, especially in crankcases, camshafts, piston ring-packs and piston undercrowns when operating with a variety of fuels. It can offer:

  • Excellent thermal and oxidation stability
  • Low volatility
  • High load-carrying properties
  • Suitable for use with liquefied natural gas (LNG)

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

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