CK-4 is the newest heavy-duty diesel oil classification approved by the American Petroleum Institute. It's designed specifically for 2017+ engines with advanced emission control systems. Many East African fleet managers wonder: "Should I switch? Will it work in older trucks? Is it worth the cost?"

This section gives context and practical guidance so you can act on the recommendations with confidence.

What CK-4 Actually Is

This section gives context and practical guidance so you can act on the recommendations with confidence.

CK-4 is a LOW-SAPS (Sulfated Ash, Phosphorus, Sulfur) diesel oil formulated for post-2016 diesel engines with:

The key difference vs older classifications (CI-4, CJ-4):

Why Low-SAPS? Ash, phosphorus, and sulfur can clog DPF filters and poison SCR catalysts. CK-4's low levels prevent this.

This section gives context and practical guidance so you can act on the recommendations with confidence.

Which Trucks Can Use CK-4?

This section gives context and practical guidance so you can act on the recommendations with confidence.

MUST use CK-4:

CAN use CK-4 (backward compatible):

Should NOT use CK-4 (use CJ-4 or CI-4 instead):

This section gives context and practical guidance so you can act on the recommendations with confidence.

CK-4 Diesel Oils Available in East Africa (2026)

This section gives context and practical guidance so you can act on the recommendations with confidence.

Shell Rimula R6 M (CK-4, 15W-40)

Total Rubia TIR 8600 (CK-4 compatible, 15W-40)

Mobil Delvac 1300 Super (CK-4, 15W-40)

Castrol Hyspin AWS 15W-40 (CK-4, 15W-40)

This section gives context and practical guidance so you can act on the recommendations with confidence.

CK-4 vs CJ-4: When CK-4 is Worth The Cost

This section gives context and practical guidance so you can act on the recommendations with confidence.

CK-4 is typically KES 30–80/L more expensive than CJ-4. Is it worth it?

For 2017+ trucks (DPF/SCR engines):

For 2010–2016 trucks (CJ-4 engines):

Scenario A: CJ-4 oil

Scenario B: CK-4 oil (extended interval approval)

Savings by switching to CK-4 with extended intervals: KES 180,000/year (20% reduction)

This section gives context and practical guidance so you can act on the recommendations with confidence.

CK-4 Extended Drain Capability

This section gives context and practical guidance so you can act on the recommendations with confidence.

Some CK-4 oils are approved for 15,000 km drain intervals (vs standard 12,500 km). This requires:

1. OEM approval (check truck manual or contact dealer)

2. Quality monitoring (oil analysis every 2 changes recommended)

3. Clean fuel quality (use branded fuel stations only)

4. Proper maintenance (air filters, fuel filters, etc.)

Example: Shell Rimula R6 M is specifically approved for 15,000 km extended intervals on most modern trucks when used with oil analysis.

Extended drain advantage:

This section gives context and practical guidance so you can act on the recommendations with confidence.

Real Fleet Case Study: Mixed Fleet (10 Old Trucks, 15 New Trucks)

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Challenge: Fleet manager has 10 older trucks (2012–2016, CJ-4 engines) and 15 new trucks (2019+, CK-4 engines). Considering standardizing on CK-4 for all.

Options:

Option A: Keep separate

Option B: Standardize on CK-4 for all

Option C: Phase out old trucks; only new trucks use CK-4

Recommendation: Option A (keep separate) — CK-4 premium not justified for backward-compatible older trucks.

This section gives context and practical guidance so you can act on the recommendations with confidence.

Myths vs Facts

❌ Myth: "CK-4 is better for all diesel trucks; switch everything to CK-4."

✅ Fact: CK-4 is specifically for 2017+ engines with DPF/SCR. For older engines, CJ-4 is adequate and 20–30% cheaper.

❌ Myth: "CK-4 is backward compatible with all older trucks."

✅ Fact: CK-4 works in CJ-4 engines (2010–2016) but provides no cost benefit due to extended drain approval being engine-specific.

❌ Myth: "Using CJ-4 in a new CK-4 truck is fine; just change oil more often."

✅ Fact: CJ-4 will clog modern DPF filters within 20,000–30,000 km, causing KES 200,000+ in damage. Not acceptable.

This section gives context and practical guidance so you can act on the recommendations with confidence.

Action Checklist

Immediate

Next 90 Days

Crown Engine Oils Distributors Expert Insight

This section gives context and practical guidance so you can act on the recommendations with confidence.

Crown Engine Oils Distributors stocks CK-4 oils specifically approved for extended drain intervals in modern East African trucks. We can help fleet managers verify truck specifications and choose the most cost-effective oil strategy.

Get expert guidance on the right lubricant for your equipment and operating conditions. Contact Crown Engine Oils Distributors for technical support and product recommendations.