Business|Cleaning|Components|DIESEL ENGINES|Energy|Engines|Gas|Road|Service|Services|System|Technology|transport|Trucks|Waste|Equipment|Waste|Operations
Business|Cleaning|Components|DIESEL ENGINES|Energy|Engines|Gas|Road|Service|Services|System|Technology|transport|Trucks|Waste|Equipment|Waste|Operations

Delo 400 SLK Caltex lubricant for heavy-duty diesel engines

Astron post image

4th May 2023


Font size: - +


Astron Energy (Pty) Ltd, licensee of Caltex-brand lubricants have introduced Delo 400 SLK SAE 15W-40 engine oil, a new premium heavy-duty diesel engine oil. The new Delo 400 SLK with ISOSYN Advanced Technology improves on the Delo 400 MGX AND now takes top spot in the premium heavy-duty diesel engine lubricant range.

The new Delo 400 SLK SAE 15W-40 is a ‘low SAPS’, API CK-4 specification engine oil and is suitable for use with diesel fuel having sulphur content of up to 500ppm. The API CK-4 category of the new Delo 400 SLK remains compatible with older CJ-4 (of the Delo 400 MGX), CI-4 Plus, CI-4 (standard), and CH-4 categories.

Delo 400 SLK SAE 15W-40 offers improved oxidation stability allowing engines to have extended drain intervals, enabling smoother and undisrupted operations even for vehicles operating under stop-and-go and sever operating conditions. The new Delo 400 SLK’s exceptional anti-wear system also offers robust wear and corrosion protection of engine components. These all mean improved equipment reliability, reduced vehicle downtime and less operational costs.

The Delo 400 SLK is able to boost the performance of various engine designs, allowing one oil for vehicles from different OEMs, from American to Japanese to European – new or old – with or without after treatment device, thus helping to reduce inventory costs for vehicle operators. This is attributed the Delo 400 SLK’s compliance with lubricant standards for newer Euro IV and V compliant engines while remaining compatible with older engines.


Minimized operating costs

Exceptional soot dispersancy keeps soot in suspension, minimizing filter plugging, cylinder head sludge, abrasive polishing wear and oil thickening. Robust wear and corrosion protection of engine components due to effective antiwear additive system. Improves equipment durability and reliability while reducing equipment downtime.

Maintain emission control system performance

This new product has been formulated with the latest generation “low-SAPS” (sulfated ash, phosphorus and sulphur) technology containing reduced levels of metals, phosphorus and sulphur. Additionally, Delo 400 SLK maximises the life of sensitive catalyst metals and the cleaning intervals of diesel particulate filters.

Reduces inventory costs

Delo 400 SLK is a balanced formulation that provides excellent overall performance in mixed fleets of different engine designs, including modern low-emission diesel engines. This allows one oil for many services and reduces the chance of product misapplication. Additionally, the new heavy-duty oil is backward compatible with previous API Oil Service Categories and engine models.

On-highway and Off-highway applications:

  • Commercial road transport with/without DPF.
  • Old and new vehicles.
  • Stop-and-go vehicles such as buses and waste collection trucks.
  • Most diesel-engine light-duty vehicles.
  • Off-highway vehicles and plants including agricultural equipment.
  • Many heavy-duty gas-fuelled vehicles.
  • Diesel engines utilising diesel fuels with up to 20% biodiesel (B20)*

To learn more about the Caltex Delo 400 SLK SAE 15W 40, speak to one of Astron Energy’s technical experts, account managers or distributor partners - or

It could just be what your business needs to save costs while still being productive.

Edited by Creamer Media Reporter




Leading condition monitoring specialists, WearCheck, help boost machinery lifespan and reduce catastrophic component failure through the scientific...

Sandvik Mining Automation image
Sandvik Mining and Rock Solutions

The AutoMine® product group offers autonomous and remotely operated mobile equipment. It allows operators to simultaneously control and monitor...


Latest Multimedia

sponsored by

Magazine round up | 23 February 2024
Magazine round up | 23 February 2024
23rd February 2024
Resources Watch
Resources Watch
21st February 2024
Photo of Martin Creamer
Major hydrogen economy developments in SA
21st February 2024

Option 1 (equivalent of R125 a month):

Receive a weekly copy of Creamer Media's Engineering News & Mining Weekly magazine
(print copy for those in South Africa and e-magazine for those outside of South Africa)
Receive daily email newsletters
Access to full search results
Access archive of magazine back copies
Access to Projects in Progress
Access to ONE Research Report of your choice in PDF format

Option 2 (equivalent of R375 a month):

All benefits from Option 1
Access to Creamer Media's Research Channel Africa for ALL Research Reports, in PDF format, on various industrial and mining sectors including Electricity; Water; Energy Transition; Hydrogen; Roads, Rail and Ports; Coal; Gold; Platinum; Battery Metals; etc.

Already a subscriber?

Forgotten your password?







sq:0.136 0.176s - 92pq - 2rq
Subscribe Now