Mobilgard™ M420 — 20 BN Medium-Speed Engine Oil | IMO 2020 | LNG Dual-Fuel

20 BN

TBN mgKOH/g

SAE 40

Grade

0.50%S

IMO 2020 Ready

LNG

Dual-Fuel Ready

MAN ES

No Objection Letter

Wärtsilä

No Objection Letter

IMO 2020 & Low Sulphur Fuel Optimised

Specifically formulated for medium-speed engines transitioning to 0.50% and 0.10% sulphur fuels — a low 20 BN formulation appropriate for reduced sulphur fuel applications where high-BN oils can cause deposit build-up and excessive engine wear.

LNG Dual-Fuel Proven

Proven for use with LNG — enabling dual-fuel vessel operators to use a single lubricant irrespective of fuel selection. Critical for vessels with dual-fuel engines that switch between LNG and 0.50% sulphur distillate at different ports or operational phases.

Outstanding Engine Cleanliness

Protects against deposits on piston undercrowns, crankcases, ring belts and camshafts — providing outstanding cleanliness especially in engines with low crankcase oil consumption or operating with low cylinder liner temperatures where deposit formation risk is highest.

Outstanding Residual Fuel Compatibility

Despite its low BN, provides outstanding residual fuel-lube compatibility — enabling vessels operating mixed residual and distillate fuel cycles to use Mobilgard M420 throughout without lubricant changes.

Excellent Thermal & Oxidation Stability

High temperature oxidation and thermal stability, low volatility, high load carrying properties and corrosion protection across a wide range of fuel grades — maintaining oil integrity over extended service intervals.

ExxonMobil Patented DAC Test

Developed using the patented DAC (Detecting Asphaltene Contamination) test — providing an early warning system for asphaltene contamination that could cause piston damage and excessive oil consumption if undetected.

IMO 2020 Compliant Vessels

Medium-speed trunk piston engines on vessels operating on 0.50% sulphur fuel — the optimal trunk piston engine oil for post-IMO 2020 compliant operations worldwide.

LNG & Dual-Fuel Vessels

Dual-fuel medium-speed engines on LNG carriers and dual-fuel ferries — enabling a single lubricant across LNG and distillate fuel operation without changeover.

Deep-Sea & Coastal Vessels

Main propulsion and auxiliary engines on deep-sea vessels, coastal ships and river vessels calling at South African ports — MAN ES and Wärtsilä medium-speed engines running on low-sulphur fuel.

Stationary Power Plants

Medium-speed stationary diesel and dual-fuel gas engines in power generation applications where low-BN, low-sulphur fuel compatible trunk piston engine oil is required.