How Often to Change Diesel Oil

If you own a turbodiesel truck, chances are you bought it for its raw power. AMSOIL synthetic diesel oils provide the outstanding protection needed to keep your truck operating at its best, but have you ever wondered how often to change diesel oil?

Unfortunately, there’s no “one-size-fits-all” answer. How often you change diesel oil will depend on a few different factors, such as…

  • Driving conditions – the higher the stress level on your engine, the higher the stress on the oil, and the more often it will require changing.
  • Ambient conditions – extreme heat and cold also take a toll on oil, requiring more frequent changes.
  • Engine modifications – if you’ve modified the engine to make more torque or power, you’ll need to change oil more often.
  • Manufacturer recommendations – each engine manufacturer provides its own oil-change recommendations, so find that information in your owner’s manual and go from there.

Change diesel oil as little as possible with oil analysis

If your goal is to change diesel oil as little as possible, you can’t beat used oil analysis.

It allows you to see precisely what’s happening inside your engine and how the oil is holding up. The results you receive from the lab will tell you whether the oil needs changing, ensuring you don’t drain out good oil.

It’s relatively inexpensive, saves time and money in the long run and, as we show here, easy to do.

Diesel trucks

How often to change AMSOIL synthetic diesel oils

If oil analysis isn’t for you, we offer a couple options.

Heavy-Duty Synthetic Diesel Oil provides outstanding protection for original equipment manufacturer (OEM)-recommended drain intervals.

Signature Series Max-Duty Synthetic Diesel Oil provides the extra protection needed for extended drain intervals.

Heavy-Duty Synthetic Diesel Oil

AMSOIL Heavy-Duty Synthetic Diesel Oil gives you the edge to keep trucks and equipment operating at peak performance. It offers outstanding value and provides excellent protection for customers seeking an upgrade over conventional, synthetic-blend or competing synthetic diesel oils.

4X more engine protection1
Excellent engine cleanliness and efficiency
Outstanding acid neutralization for long-term engine protection
Exceptional protection for OEM-recommended drain intervals
Available in 10W-30, 5W-40 and 15W-40 viscosities

Heavy-Duty Diesel Oil

Signature Series Max-Duty Synthetic Diesel Oil

Protect your investment in diesel power and confidently extend drain intervals with Signature Series Max-Duty Synthetic Diesel Oil. Advanced synthetic technology provides excellent viscosity control and outstanding extreme-temperature performance, while minimizing oil consumption.

6X more engine protection2
Ultimate engine cleanliness and efficiency
Outstanding acid neutralization for long-term engine protection
Top-grade protection for extended drain intervals
• Available in 5W-30, 10W-30, 0W-40, 5W-40 and 15W-40 viscosities

Max-Duty Diesel Oil

How far can I extend drain intervals with Signature Series Diesel Oil?

Diesel engine service life

Heavy-Duty On-/Off-Road: Three times (3X) OEM3 recommendation, not to exceed 60,000 miles (96,500 km)/600 hours or one year, whichever comes first.

Turbodiesel Pickup: Two times (2X) OEM3 recommendation, not to exceed 25,000 miles (40,200 km) or one year, whichever comes first.

Competition Service Life: Provides lasting protection for multiple events. Use oil analysis to determine appropriate drain interval.

Gasoline engine service life

Two times (2X) OEM3 recommendation, not to exceed 15,000 miles (24,100 km) or one year, whichever comes first.

Drain intervals may be extended further with oil analysis.

1than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222 using 10W-30 as worst-case representation.
2than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222 using 5W-30 as worst-case representation.
3Refer to your owner’s manual for OEM drain interval recommendations and guidelines for severe and normal service.

Note: Extended drain intervals are not recommended for performance-modified engines, when using biofuels containing more than 10 percent ethanol or 15 percent biodiesel (B15) or for 2007-2009 Caterpillar C13 and C15 on-highway engines. Extend drain intervals beyond OEM recommendations in these instances only with oil analysis. Note: 2007-2010 Dodge, Ford and GM turbodiesel pickups are also not recommended for extended drain intervals when using Signature Series Max-Duty 5W-30 Synthetic Diesel Oil (DHD).

Comments

  1. Thanks for pointing out that cleanliness is also a factor to look into when attempting to buy new oil for a diesel engine. Before the fall ends, I’d like to make sure that my car is in good condition for the coming winter since it gets very cold where I live. Maybe max duty diesel oil will do in making sure that the engine oil doesn’t freeze up.

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