Caltex Delo 400 SLK SAE 15W-40, 5 L

The product

Caltex Delo 400 SLK SAE 15W-40 is a premium heavy-duty diesel engine oil. AVDMM is an authorised Caltex / Astron Energy lubricants wholesaler.

Product description

The following is the exact wording from the current PDS:

Delo® 400 SLK with ISOSYN® Advanced Technology is a premium range of quality low Sulphated Ash, Phosphorous and Sulfur (SAPS) heavy-duty diesel engine oils, engineered to help provide robust performance and protection for a wide range of high-speed diesel engines operating under the most severe service conditions.

It is formulated using latest generation additive technologies to help provide excellent protection for on-highway and off-highway applications, including vehicles and equipment fitted with diesel particulate filters (DPF), selective catalytic reduction (SCR) and / or exhaust gas recirculation (EGR) emissions control technologies.

Applications

Exact PDS application list:

  • Commercial road transport, including latest-generation engines fitted with exhaust emissions control devices of all types
  • Vehicles meeting the most recent exhaust emissions standards, including US EPA 2002, 2007 and 2010, 2017 greenhouse gas (GHG 17) Euro IV, V and VI, and Australian ADR 80/02 and ADR 80/03 (for heavy duty)
  • Mixed fleets of both old and new equipment from many European, North American and/or Japanese OEMs
  • Stop-and-go vehicles in high soot loading service such as buses and waste collection trucks
  • Most light duty vehicles with diesel engines
  • Off-highway vehicles and plants including agricultural equipment
  • Many heavy-duty gas-fueled vehicles
  • Mobile hydraulic systems (where oil type and viscosity are appropriate)
  • Diesel engines utilizing diesel fuels with up to 50% biodiesel (B50)

Approvals, performance and recommendations

The wording below is taken from the PDS approvals table for Delo 400 SLK SAE 15W-40 (the 10W-30 column is omitted because this page is the 15W-40 grade only).

Approved (PDS: “Approved”):

  • Cummins CES 20086
  • Daimler Trucks DTFR 15C100 (previously MB 228.31)
  • Detroit Diesel (Daimler Truck) 93K222
  • Deutz DQC III-18 LA
  • MAN Truck & Bus (Traton) M 3775
  • MTU Category 2.1
  • Volvo VDS-4.5
  • Mack EOS-4.5
  • Renault VI RLD-3
  • ZF TE-ML 04C
  • API CK-4/CJ-4/CI-4/CH-4/CI-4 PLUS/SN

Meets requirements (PDS: “Meets requirements”):

  • ACEA E11
  • Caterpillar ECF-3
  • Ford WSS-M2C171-F1
  • JASO DH-2

OEM names are given as text only. Check your OEM manual.

Typical test data (SAE 15W-40)

From the PDS typical test data for SAE 15W-40 (product code 505502):

Property Test method SAE 15W-40
Base No., mg KOH/g ASTM D2896 8.5
Sulphur, m% X-ray/ICP 0.32
Sulfated Ash, m% ASTM D874 1.0
Kinematic viscosity, mm²/s @ 40°C ASTM D445 107
Kinematic viscosity, mm²/s @ 100°C ASTM D445 14.7
Viscosity Index ASTM D2270 141

Pour point and flash point are not stated on this PDS.

While the values and characteristics are considered representative, some variation, not affecting performance, can be expected.

Service considerations

Selected sentences from the PDS service considerations:

  • “Low SAPS” engine oils tend to have lower Base Numbers than “conventional” heavy duty diesel engine oils. Used in conjunction with today’s low, very low or ultra-low sulfur content fuels this is of no consequence. However, in situations where very high sulfur (>0.5%) fuels are in use this may limit achievable drain intervals. Fuel sulfur levels have declined significantly over the past decade but are still relatively high in some countries, so short drain intervals are recommended. Speak to a Caltex Technical Representative for more information.
  • While the level of phosphorus is low by heavy duty diesel engine oil standards, it is somewhat higher than permitted by certain recent standards for passenger car motor oils, e.g. ILSAC GF-5, and the ACEA “C” standards. Always use the oils listed in the performance standard recommended by the vehicle manufacturer to improve the life of the catalytic emission control systems.
  • When using with bio-diesel blended fuel meeting ASTM D7467 (B6 – B50) or equivalent it is critical to monitor the engine oil level and performance.
  • When using with biodiesel blends containing >7% B100, monitoring oil condition is critical. Fuels with higher biodiesel content increase the risk of fuel dilution in the engine oil.
  • Always follow OEM recommendation for appropriate fuel and engine oil selection. Check your OEM manual.

This pack

Pack: 4 x 5 L case, and as a single 5 L bottle.

Ask us for availability.

A 500 ml pack is listed on the small packs for workshops page.

Other Delo 400 SLK 15W-40 packs: Delo 400 SLK 15W-40, 20 L and Delo 400 SLK 15W-40, 210 L. See all Delo grades on the Delo lubricants page.

Source: Caltex / Chevron Delo 400 SLK PDS (MEA), v5, 19 May 2026.

How to order

André van de Merwe Motors (AVDMM) is an authorised Caltex / Astron Energy lubricants wholesaler in Benoni. We also supply Castrol and Shell.

  • Collection from our Benoni South counter. Same-day collection on Caltex products, subject to stock: order by 16:30 Monday to Thursday, or 14:30 on Friday.
  • We deliver across Gauteng and surrounding provinces, quoted per order.
  • Ask us for a trade price, pack availability and a delivery date.

Telephone: 011 422 1333
Email: info@avdmm.co.za