Qu'est-ce que CF-4 Oil and When Should You Use It?
CF-4 diesel engine oil isn’t just another label—it’s a lifeline for older trucks, bulldozers, and industrial engines. This API specification was introduced in the 1990s. It was made for pre-2009 diesel engines that face high heat and soot. But with newer oils like CJ-4 and CK-4 on the market, does CF-4 still matter? Let’s break it down.
3 Key Benefits of CF-4 Oil Your Engine Will Love
1. Soot-Busting Superpowers
CF-4 handles 0.5–1% soot buildup, which is common in older engines. It stops sludge in turbochargers—a must for 90s-era Cummins and CAT engines. A 2022 study even showed CF-4 reduced wear by 38% compared to older oils in vintage tractors.
2. High-Temperature Resilience
CF-4 protects engine bearings up to 230°F (110°C). This makes it perfect for dump trucks hauling heavy loads uphill. It’s also great for engines without modern cooling systems. For example, it’s still used in Nigerian oil fields for 1980s generators.
3. Budget-Friendly Protection
CF-4 oil costs 20–30% less than CK-4 oils. You won’t need expensive engine upgrades, either. Farmers report saving $3,000 yearly by using CF-4 in older combines.
Where CF-4 Shines (and Where It Doesn’t)
Idéal pour :
▶ 1990–2009 diesel trucks
▶ Pre-2000s construction gear
▶ Marine engines
Avoid For:
❌ Engines with DPFs (made after 2007)
❌ Low-sulfur diesel systems
❌ Cold climates below -15°C
CF-4 vs. Modern Oils: What Mechanics Say
VS. CJ-4: CF-4 works better with high-sulfur fuel but doesn’t suit modern exhaust systems.
VS. CK-4: CF-4 has fewer additives but is gentler on older engine seals.
Conseil de pro : Mix 1L of CF-4 with CK-4 during oil changes for older rigs. It helps balance additives.
5 Signs You’re Using the Wrong Oil
- Blue smoke at startup
- Oil turns black fast
- Turbo sounds louder
- Poor fuel economy
- Check engine lights (codes P0520/P0521)
2024’s Smart CF-4 Buying Guide
- Look for API CF-4/SJ dual ratings
- Use 15W-40 viscosity for most weather
- Trust brands like ZTSh Oil’s LegacyShield line
FAQ: Your CF-4 Questions Answered
Q: Can CF-4 damage newer engines?
A: Yes! It lacks additives for emissions systems. Check your manual first.
Q: How often to change CF-4 oil?
A: Every 5,000 miles or 200 engine hours.
Q: Where to buy CF-4 oil?
A: Specialty suppliers like ZTSh Oil offer certified batches.
Myth Buster: “CF-4 is Obsolete”
CF-4 oil isn’t for new trucks, but it’s still vital for:
▶ Classic diesel restorations
▶ Mining gear in developing countries
▶ Backup generators needing zinc-rich oil
Conclusion: Right Oil, Right Era
CF-4 diesel oil isn’t outdated—it’s perfect for its era. For pre-2009 engines, it offers affordable protection that new oils can’t beat. Always check your engine specs and talk to experts like ZTSh Oil. Your diesel deserves oil that understands its needs.