Which Engine Oil Should You Pick and Why? | A Guide from BAVMODS | Castrol Edge, Liqui-Moly, Mobil 1, etc.

Written By: BAVMODS Team

Updated: Aug 13, 2024

The Purpose of Engine Oil

 

We understand that your BMW is more than just a car—it's a finely-tuned machine that deserves the best care. One of the most critical aspects of maintaining your BMW's performance and longevity is choosing the right engine oil. In this guide, we’ll share our expertise on the importance of oil, how to choose the right viscosity, and the brands we trust to keep your engine running smoothly.

 

Engine oil is the lifeblood of your BMW’s engine. It serves several crucial functions, including:

  • Lubrication: Reduces friction between the moving parts, preventing wear and tear.
  • Cooling: Helps dissipate heat generated by the engine, preventing overheating.
  • Cleaning: Traps dirt, debris, and combustion by-products, keeping your engine clean.
  • Sealing: Assists in sealing the gaps between engine components, ensuring optimal compression.

Without the right oil, your engine is at risk of increased wear, reduced performance, and potential failure. That’s why choosing the right oil viscosity and brand is essential for every BMW owner.

Understanding Oil Viscosity: What Do the Numbers Mean?

Oil viscosity is essentially the thickness of the oil and its ability to flow at different temperatures. You’ve probably seen labels like 0W-30, 5W-40, or 10W-60 on oil containers, but what do these numbers mean?

 

The First Number (e.g., 0W, 5W, 10W):

  • This number indicates the oil’s viscosity at cold temperatures. The “W” stands for winter.
  • Lower numbers (e.g., 0W) mean the oil is thinner at cold temperatures, which is ideal for cold climates.
  • Thicker oil at cold start (e.g., 10W) might not flow as quickly, which can lead to less immediate protection.

The Second Number (e.g., 30, 40, 60):

  • This number indicates the oil’s viscosity at normal engine operating temperatures.
  • Higher numbers mean the oil is thicker when hot, which provides more protection in high-performance or hot climate conditions.
  • Thinner oil at operating temperatures can reduce fuel consumption but might not protect as well under high-stress conditions.

Which Viscosity Should You Choose?

Choosing the right oil viscosity depends on several factors, including your driving conditions, climate, and engine type. Here’s a quick breakdown:

  • 0W-30: Best for extremely cold climates where temperatures regularly drop below freezing. This oil flows quickly during cold starts, protecting your engine right from the start.
  • 5W-30: A great all-rounder for moderate climates (around 20°C) and is often recommended for newer BMW models. It balances cold start protection with high-temperature performance.
  • 5W-40: Ideal for warmer climates or engines that run hotter, such as performance-oriented BMWs. It provides better protection at higher operating temperatures.
  • 10W-60: Recommended for high-performance BMW engines, especially those used in motorsports. This oil is designed to withstand the intense heat and stress of high-speed driving.

Preferred Brands for Your BMW

We recommend only the best brands that meet BMW’s stringent requirements:

  • Castrol: A long-time favorite among BMW owners, Castrol oils are known for their superior quality and long-lasting protection, while remaining very affordable.
  • Liqui Moly: This German brand is highly regarded for its advanced formulations that are perfect for BMW engines, particularly those with higher mileage. Liqui-Moly oils cost marginally more than brands such as Castrol, but are seen as the pinnacle of oil performance.
  • Shell: Another reliable choice, Shell oils are designed to meet the high demands of BMW engines, offering excellent protection and performance.
  • Mobil 1: A premium synthetic oil brand that provides exceptional protection and longevity, especially in extreme driving conditions. This oil is usually recommended by American and Japanese car owners, but is still used in German vehicles by many.

Average Costs of BMW-Approved Engine Oils

1. Castrol

  • Castrol Edge 5W-30:
    • Per Quart: $8 - $12
    • Per Gallon (3.78 liters): $30 - $40
  • Castrol Edge 5W-40:
    • Per Quart: $10 - $15
    • Per Gallon: $35 - $45
  • Castrol Edge 10W-60 (for high-performance engines):
    • Per Quart: $15 - $20
    • Per Gallon: $55 - $75

2. Liqui Moly

  • Liqui Moly Leichtlauf High Tech 5W-40:
    • Per Liter: $10 - $14
    • Per 5-Liter Jug: $45 - $60
  • Liqui Moly Special Tec LL 5W-30:
    • Per Liter: $11 - $16
    • Per 5-Liter Jug: $50 - $65
  • Liqui Moly Synthoil Race Tech GT1 10W-60:
    • Per Liter: $14 - $20
    • Per 5-Liter Jug: $65 - $90

3. Shell

  • Shell Helix Ultra 5W-40:
    • Per Liter: $8 - $12
    • Per 5-Liter Jug: $40 - $55
  • Shell Helix Ultra 0W-30:
    • Per Liter: $9 - $13
    • Per 5-Liter Jug: $45 - $60

4. Mobil 1

  • Mobil 1 0W-40:
    • Per Quart: $9 - $14
    • Per Gallon: $35 - $50
  • Mobil 1 High Mileage 5W-30:
    • Per Quart: $7 - $12
    • Per Gallon: $30 - $45
  • Mobil 1 Racing 4T 10W-60:
    • Per Quart: $15 - $22
    • Per Gallon: $60 - $85
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Final Tips and Recommendations
  • Always Use BMW-Approved Oils: Look for oils that meet the BMW Longlife (LL) specifications, such as LL-04. These oils are specifically formulated to meet the needs of BMW engines.
  • Change Your Oil Regularly: For optimal engine health, we recommend changing your oil every 7,500 to 10,000 miles, or more frequently if you drive under severe conditions.
  • Don’t Forget the Filter: Always replace your oil filter with each oil change to ensure that your new oil stays clean and effective.

At BAVMODS, we’re dedicated to helping you get the most out of your BMW. By choosing the right oil and maintaining your engine with care, you’ll enjoy smooth, reliable performance for years to come. For more tips, product recommendations, or if you have any questions, don’t hesitate to reach out to our expert team.

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