- Recommended for applications specifying API CI-4+ and prior specifications
- Controls soot and wear
- Reduces oil consumption and emissions
- Delivers maximum engine protection over extended drain intervals
- Provides outstanding protection and performance in temperature extremes
- Try Signature Series Max-Duty 15W-40 for a serious upgrade
Product Overview
Premium diesel oil providing excellent performance in diesel engines where highly effective control of wear and deposits is vital. Built with heavy-duty dispersant/detergent additives with 12 TBN, Synthetic Heavy-Duty Diesel & Marine Oil neutralizes acids and controls soot thickening from EGR and blow-by to protect against corrosion, cylinder bore polishing (wear) and varnish/sludge deposits. It resists heat and breakdown and is formulated for extended drain intervals.
CONTROLS SOOT AND WEAR
- Neutralizes acids and controls soot thickening to protect against corrosion, wear, varnish and sludge deposits
- Reduces oil consumption and emissions
- Delivers maximum engine protection over extended drain intervals
EXCELS IN EXTREME TEMPERATURES
- Provides outstanding protection and performance in temperature extremes
- Resists heat and breakdown better than conventional oils
- Eases cold-weather starting and provides vital startup lubrication
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Product information checked: September 2026. Product formulations, specifications, applications, availability and published claims can change.
For the latest official information, consult the AMSOIL Corproate Website.
