Engine Burning Oil or Running Noisy? Viscoplus Oil Additive LM20338 — Restore Viscosity Fast

High oil consumption, engine noise, and viscosity loss are signs your motor oil is no longer protecting your engine the way it should. In most 4-stroke gasoline and diesel engines, this is caused by viscosity breakdown under heat, cold-start shear stress, or extended drain intervals. When it fails to maintain proper viscosity, you get increased wear, louder operation, higher oil consumption, and reduced engine protection. ⚡ Common issue in high-mileage engines and vehicles with frequent cold starts. Part LM20338 is the genuine Liqui-Moly Viscoplus for Oil — a mono-functional viscosity stabilizer that restores and maintains optimal oil pressure and lubrication under all operating conditions.

❓ Is This the Right Part?

This is the correct fix if ALL of the following are true:

• ✔ Engine runs and starts normally — no mechanical failure present
• ✔ Oil level is correct but consumption is higher than expected
• ✔ Engine oil is within service life or recently changed
• ✔ ONLY problem is increased noise, oil burn-off, or viscosity-related performance loss

Not sure? Send us your vehicle details — we'll confirm before you order.

🔧 Common Symptoms

• Engine running louder than normal, especially at idle or cold start
• Higher-than-normal oil consumption between changes
• Visible blue smoke from exhaust (oil burning)
• Low oil pressure warning light or sluggish engine response

✔ If these symptoms match, viscosity breakdown is the most likely cause.

✔ In most cases, adding Viscoplus LM20338 to your existing motor oil restores normal viscosity and reduces noise immediately after warm-up.

📦 Part Details

• Part Number: LM20338
• Type: Mono-functional viscosity stabilizer / oil additive — 300 mL
• Compatible With: All 4-stroke gasoline and diesel engines, with or without turbochargers
• Safe For: Catalytic converters, GPF, and DPF systems
• Treats: 3–5 Litres (0.8–1.3 gal) of motor oil per bottle
• Not Suitable For: Motorcycles with wet clutches
• Brand: Liqui-Moly

⚙️ Application Instructions

Skill Level: Easy — 5 minutes. Ensure engine is at operating temperature before adding. Pour the full 300 mL contents directly into the engine oil filler cap. Run the engine for 10–15 minutes to allow full mixing and distribution throughout the oil system. Can be added at any time — does not require an oil change.

✓ Compatible Applications

Compatible with all 4-stroke gasoline and diesel passenger vehicles, light trucks, and SUVs — with or without turbochargers. Safe for use with catalytic converters and particulate filters (GPF/DPF). One 300 mL bottle treats 3–5 litres of motor oil. Contact us to verify compatibility with your vehicle before ordering.

💡 Pro Tip