BMW or Mercedes Diesel Due for an Oil Change? Liqui Moly Top Tec 4600 5W-30 20448 — OEM-Grade Protection in Every Change
Modern BMW and Mercedes-Benz diesel engines require a low-SAPS synthetic oil that meets strict manufacturer approvals — using the wrong oil risks DPF damage, voided warranties, and accelerated engine wear. Liqui Moly Top Tec 4600 5W-30 is a full synthetic, low-SAPS motor oil engineered specifically for BMW and Mercedes-Benz diesel engines equipped with diesel particulate filters (DPF). Its advanced formula provides instant cold-start lubrication, high shear stability under load, and outstanding engine cleanliness across extended drain intervals. ⚡ The go-to 5W-30 for BMW LL-04 and Mercedes-Benz 229.51 applications. Liqui Moly 20448 is the professional-grade choice that delivers OEM-specified protection, made in Germany by the world’s most awarded motor oil brand.
❓ Is This the Right Oil for Your Vehicle?
Top Tec 4600 5W-30 is the correct choice if ALL of the following apply:
- ✔ Your vehicle is a BMW or Mercedes-Benz diesel (or petrol engine requiring LL-04 / 229.51 spec)
- ✔ Your engine is equipped with a diesel particulate filter (DPF)
- ✔ Your manufacturer specifies a 5W-30 low-SAPS oil
- ✔ You want to follow OEM-recommended extended drain intervals
Not sure? Send us your model and year — we'll confirm the correct spec before you order.
🔧 Key Performance Benefits
- Excellent wear protection — shields engine components from friction across all operating conditions
- Instant lubrication after cold start — critical for turbo and valve train protection
- High shear stability — maintains viscosity under extreme load and temperature
- Outstanding engine cleanliness — prevents sludge and deposit buildup
- DPF compatible — low-SAPS formula protects diesel particulate filters from contamination
- Reduces fuel consumption and pollutant emissions
- Miscible with all commercially available motor oils
📦 Product Details
- Part Number: 20448
- Brand: Liqui Moly — Made in Germany
- Viscosity: 5W-30
- Volume: 5 Litres
- Type: Full Synthetic Low-SAPS Motor Oil
- Approvals / Specs: BMW Longlife-04, Mercedes-Benz 229.51, VW 505.00, VW 505.01, Porsche C30
- Compatible Engines: 4-stroke gasoline and diesel engines requiring low-SAPS 5W-30
- Safe For: DPF, turbochargers, catalytic converters
- Country of Origin: Germany
- GTIN: 04100420204487
Always replace the oil filter at the same time as the oil. A used filter loaded with old oil contaminants will degrade fresh oil within the first few hundred kilometres — negating the benefit of a quality synthetic. Pair with a Liqui Moly engine flush if switching from conventional oil or performing a high-mileage service.
⚙️ How to Use
Standard oil change procedure. Warm the engine to operating temperature, drain the old oil completely, replace the oil filter, and refill with the correct quantity of Liqui Moly Top Tec 4600 5W-30 per your vehicle’s specification. Check the dipstick and confirm the level before starting. Reset the oil service indicator per your vehicle’s procedure. Dispose of used oil responsibly at a certified recycling facility.
📄 Technical Documents
Product Data Sheet (PDF) | Safety Data Sheet (PDF)
💡 Pro Tip
5W-30 is a viscosity grade, not a specification — and not all 5W-30 oils are interchangeable. BMW LL-04 and Mercedes 229.51 require a low-SAPS formulation that standard 5W-30 oils do not meet. Using a non-approved oil in a DPF-equipped engine can clog the filter within one drain interval, leading to a regeneration fault and a costly DPF replacement. Always verify the approval code on the label before purchasing any motor oil for a European diesel.
✅Compatibility & Cross Reference
Not sure about your model number? Call 1-877-899-7278 and we’ll help you confirm. All brand names are the property of their respective owners and are used for compatibility reference only.
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