2013 Bmw 335I Oil Type​ – Your Definitive Guide To Engine Health

ByRobert Lozano

Keeping your N55 engine running strong means choosing the right oil. This guide cuts through the confusion, detailing the exact specifications and best practices for selecting and changing the oil in your 2013 BMW 335i, ensuring optimal performance and longevity. Discover the precise viscosity, BMW Longlife approval, and essential tips for maintaining your high-performance German machine.

Your 2013 BMW 335i isn’t just a car; it’s a meticulously engineered performance machine. From its precise handling to its potent N55 turbocharged inline-six engine, every component works in harmony to deliver that signature BMW driving experience. However, this level of engineering demands specific care, especially when it comes to the lifeblood of your engine: the oil.

Choosing the correct 2013 BMW 335i oil type isn’t merely a suggestion; it’s critical for protecting your investment and ensuring your engine operates at peak efficiency. Using the wrong oil can lead to premature wear, reduced fuel economy, and potentially costly repairs down the line. This comprehensive guide will equip you with all the knowledge you need, whether you’re a seasoned DIY mechanic or a first-time BMW owner looking to understand your vehicle better.

We’ll delve into the precise specifications, decode BMW’s recommendations, and provide practical advice to help you maintain your 335i with confidence. Let’s ensure your N55 keeps purring like it should.

Understanding the 2013 BMW 335i Oil Type Specifications

When it comes to your 2013 BMW 335i, not just any motor oil will do. BMW engines, especially the N55, are designed with tight tolerances and specific lubrication requirements. The primary factors to consider are the oil’s viscosity and its BMW Longlife (LL) approval rating.

Decoding BMW Longlife (LL) Approvals

BMW has its own set of specifications for engine oils, known as “Longlife” or “LL” approvals. These ratings indicate that an oil has passed stringent tests to meet BMW’s standards for engine protection, fuel efficiency, and extended drain intervals. For your 2013 335i, the key approval you’re looking for is BMW LL-01.

LL-01 oils are formulated for gasoline engines built before 2004 and some specific models after, including your N55. They are typically high-performance, full synthetic oils designed to withstand the demands of turbocharged engines and extended service intervals. Always verify that the oil bottle explicitly states “BMW LL-01 Approved” or “Meets BMW LL-01 Specification.”

Recommended Viscosity Grades for Your N55 Engine

Beyond the LL-01 approval, the oil’s viscosity is equally important. Viscosity refers to the oil’s resistance to flow at different temperatures. BMW generally recommends two primary viscosity grades for the 2013 BMW 335i oil type:

  • 5W-30: This is a very common and highly recommended viscosity for the N55 engine. The “5W” indicates its performance in cold weather, allowing for easier starting and quicker lubrication upon ignition. The “30” refers to its viscosity at operating temperature, providing excellent protection under normal driving conditions.
  • 5W-40: Some BMW owners, especially those in hotter climates or who engage in more spirited driving, opt for a 5W-40. This oil offers a slightly thicker film at higher operating temperatures, which can provide an extra layer of protection under extreme stress. Always ensure it carries the LL-01 approval.

Both 5W-30 and 5W-40 are suitable, provided they meet the BMW LL-01 specification. Consult your owner’s manual for the most precise recommendation for your specific vehicle and climate.

Why the Right Engine Oil Matters for Your N55

The N55 engine in your 2013 BMW 335i is a marvel of engineering, but it relies heavily on proper lubrication to function correctly and reliably. Using the correct oil isn’t just about avoiding engine failure; it’s about optimizing performance, efficiency, and longevity.

Protecting Turbocharged Components

Your 335i’s N55 engine features a single twin-scroll turbocharger. This component operates at extremely high RPMs and temperatures. Engine oil circulates through the turbocharger to lubricate its bearings and cool its internal components. An oil that doesn’t meet BMW’s specifications can break down under these harsh conditions, leading to turbocharger wear, seal failure, and eventually, expensive repairs.

A high-quality, full synthetic LL-01 approved oil is formulated to withstand these extreme temperatures and resist thermal breakdown, providing crucial protection for your turbo.

Maintaining Valvetronic and VANOS Systems

BMW’s N55 engine incorporates advanced technologies like Valvetronic (variable valve lift) and VANOS (variable valve timing). These systems rely on precisely controlled oil pressure and clean oil passages to operate correctly. Incorrect oil viscosity or a non-approved oil can cause sludge buildup, restrict oil flow, and lead to sluggish or erratic operation of these critical components.

You might experience rough idling, reduced power, or even error codes if these systems aren’t properly lubricated and actuated.

Preventing Sludge and Carbon Buildup

Modern engines, especially direct-injected turbocharged ones like the N55, are susceptible to carbon buildup on intake valves and the formation of sludge within the engine. Full synthetic oils are engineered with detergents and dispersants that help to prevent these issues.

Choosing the correct 2013 BMW 335i oil type helps keep your engine’s internals clean, ensuring optimal oil flow and reducing the risk of premature wear on moving parts.

See also Bmw I8 Gas Mileage​ – Maximizing Efficiency In A Hybrid Supercar

Choosing the Best Oil Filter and Other Essential Supplies

An oil change isn’t complete without replacing the oil filter. The filter plays a vital role in removing contaminants from your engine oil, protecting your engine from abrasive particles. Beyond the filter, having the right tools and supplies makes the job smoother and safer.

Selecting the Right Oil Filter for Your N55

For your 2013 BMW 335i, you’ll need a specific oil filter designed for the N55 engine. BMW uses a cartridge-style filter, which is housed in a separate oil filter housing. Always opt for a high-quality filter from a reputable brand.

  • OEM BMW Filter: The safest bet is always an original equipment manufacturer (OEM) BMW filter. These are designed to exact specifications for your engine.
  • Mann-Filter, Mahle, Hengst: These are all highly respected aftermarket brands that often supply OEM filters to BMW. Their aftermarket filters are typically identical in quality and performance to the BMW-branded ones.

A new oil filter usually comes with new O-rings for the filter housing cap and a new drain plug crush washer. Always replace these seals to prevent leaks.

Essential Tools and Supplies for a DIY Oil Change

If you plan to tackle the oil change yourself, gather these items before you begin:

  • New Engine Oil: Approximately 6.9 quarts (6.5 liters) of BMW LL-01 approved 5W-30 or 5W-40 oil.
  • New Oil Filter Kit: Includes the filter cartridge, new O-rings, and a new drain plug crush washer.
  • Oil Filter Wrench: A 86mm 16-flute oil filter cap wrench is specifically needed for the N55 filter housing.
  • Socket Wrench Set: You’ll need a 17mm socket for the drain plug.
  • Torque Wrench: Essential for tightening the drain plug and oil filter housing cap to the correct specifications (typically 25 Nm for the drain plug, 25 Nm for the filter cap).
  • Drain Pan: Large enough to hold at least 7 quarts of old oil.
  • Funnel: For adding new oil without spills.
  • Gloves and Shop Rags: To keep things clean and protect your hands.
  • Jack and Jack Stands or Car Ramps: For safely lifting the vehicle to access the drain plug. Never work under a car supported only by a jack.
  • Wheel Chocks: To prevent the vehicle from rolling.

DIY Oil Change for Your 2013 BMW 335i: A Step-by-Step Walkthrough

Performing an oil change on your 2013 BMW 335i can be a rewarding and cost-saving task. However, safety and precision are paramount. Follow these steps carefully.

Safety First: Preparing Your Vehicle

  1. Warm Up the Engine: Drive your car for 5-10 minutes to bring the oil to operating temperature. Warm oil flows more easily and carries contaminants better.
  2. Park on a Level Surface: This ensures accurate drainage and safe lifting.
  3. Engage Parking Brake: Always activate the parking brake.
  4. Lift and Secure the Vehicle: Use a jack to lift the front of the car, then immediately place sturdy jack stands under the designated lift points. Ensure the car is stable before proceeding. Alternatively, drive onto car ramps. Chock the rear wheels for extra security.

Draining the Old Oil

  1. Locate the Drain Plug: Underneath the engine, you’ll find the oil pan and the drain plug. It’s typically a 17mm bolt.
  2. Position Drain Pan: Place your oil drain pan directly beneath the drain plug.
  3. Remove Drain Plug: Using your 17mm socket, carefully loosen and remove the drain plug. The oil will flow out quickly, so be ready.
  4. Allow to Drain Completely: Let the oil drain for at least 15-20 minutes. While it’s draining, you can proceed to change the oil filter.

Replacing the Oil Filter

  1. Locate Filter Housing: The oil filter housing is on top of the engine, typically near the front passenger side.
  2. Remove Filter Cap: Use your 86mm 16-flute oil filter wrench to loosen the filter housing cap. Unscrew it completely and lift it out.
  3. Remove Old Filter: Pull the old filter cartridge off the cap.
  4. Replace O-rings: Carefully remove the old O-rings from the filter cap and replace them with the new ones provided in your filter kit. Lightly lubricate the new O-rings with a dab of fresh engine oil.
  5. Install New Filter: Push the new filter cartridge onto the cap until it clicks into place.
  6. Reinstall Filter Cap: Screw the filter cap back into the housing by hand until snug, then use your torque wrench to tighten it to the specified 25 Nm (18.4 ft-lbs). Do not overtighten!

Refilling with New Oil

  1. Replace Drain Plug: Once the old oil has finished draining, clean the drain plug and install a new crush washer. Reinstall the drain plug and tighten it to 25 Nm (18.4 ft-lbs) with your torque wrench.
  2. Add New Oil: Using a funnel, slowly pour approximately 6.5 liters (6.9 quarts) of the correct 2013 BMW 335i oil type (LL-01 approved 5W-30 or 5W-40) into the engine’s oil filler cap.
  3. Check Oil Level: Start the engine and let it run for a minute to circulate the new oil. Turn off the engine. BMWs typically have an electronic oil level sensor, which will display the oil level on your iDrive screen after a short drive or while idling. Allow a few minutes for the oil to settle before checking.
  4. Adjust as Needed: Add small amounts of oil (0.25-0.5 quarts) if the electronic dipstick indicates it’s low, rechecking after each addition. Do not overfill.
See also 2011 Bmw 328I Fuel Capacity​ – Real-World Range And Maintenance Guide

Final Steps and Disposal

Lower your vehicle safely off the jack stands or ramps. Take your old engine oil to an approved recycling center or auto parts store that accepts used oil. Never pour used oil down the drain or into the ground.

Common Oil-Related Issues and Preventative Maintenance

Even with the right oil, BMWs can experience specific oil-related issues. Being aware of these and practicing good preventative maintenance can save you headaches and money.

Oil Leaks: A Common BMW N55 Challenge

The N55 engine, like many BMW engines, is prone to oil leaks as it ages. Common culprits include:

  • Valve Cover Gasket (VCG): Leaks often appear as oil seeping onto the exhaust manifold, causing a burning smell.
  • Oil Filter Housing Gasket (OFHG): A common leak point that can drip oil onto the serpentine belt, potentially causing it to slip or break.
  • Oil Pan Gasket: Leaks from the bottom of the engine, often requiring more labor to repair.

Regularly inspect under your car for drips and visually check the engine bay for any signs of oil residue. Addressing small leaks early can prevent bigger problems. If you suspect a significant leak, it’s best to consult a professional mechanic.

Oil Consumption: Is it Normal?

Some oil consumption is normal, especially in high-performance turbocharged engines. BMW states that consumption of up to 1 liter per 1,000 miles can be considered normal. However, excessive consumption (e.g., needing to add a quart every few hundred miles) could indicate a problem, such as worn piston rings, valve stem seals, or a failing PCV (Positive Crankcase Ventilation) system.

Always monitor your oil level electronically and top off as needed using the recommended 2013 BMW 335i oil type. If you notice a sudden increase in consumption, have it checked.

Adhering to Service Intervals and Beyond

BMW’s recommended oil change intervals can be quite long (e.g., 10,000-15,000 miles or annually) thanks to the use of long-life synthetic oils. While these intervals are generally safe, many enthusiasts and mechanics recommend shorter intervals, especially if you:

  • Drive aggressively or track your car.
  • Do a lot of short trips (where the oil doesn’t fully warm up).
  • Live in extremely hot or cold climates.

Consider changing your oil every 5,000-7,500 miles or every 6 months to provide an extra layer of protection and keep your N55 in top condition. This proactive approach can significantly extend the life of your engine and its components.

Frequently Asked Questions About 2013 BMW 335i Oil Type

Can I use conventional oil in my 2013 BMW 335i?

No, absolutely not. The N55 engine is designed exclusively for full synthetic oil that meets the BMW LL-01 specification. Conventional or semi-synthetic oils will not provide adequate protection, especially for the turbocharger and advanced valve timing systems, leading to premature wear and potential engine damage.

How much oil does a 2013 BMW 335i N55 engine take?

The 2013 BMW 335i with the N55 engine typically requires approximately 6.9 quarts (6.5 liters) of engine oil during an oil change, including the filter replacement. Always confirm with your owner’s manual and adjust based on the electronic oil level sensor.

What’s the difference between 5W-30 and 5W-40 for my 335i?

Both 5W-30 and 5W-40 are acceptable viscosity grades for your 335i, provided they have the BMW LL-01 approval. The “W” stands for winter, and both perform similarly in cold starts. The “30” or “40” refers to the oil’s viscosity at operating temperature. 5W-40 is slightly thicker at hot temperatures, which can offer a bit more protection under very high stress or in extremely hot climates. For most driving conditions, 5W-30 LL-01 is perfectly suitable and often recommended.

How often should I change the oil in my 2013 BMW 335i?

BMW’s recommended service interval for the 2013 335i with LL-01 oil is typically 10,000-15,000 miles or annually, whichever comes first. However, for optimal engine health, especially if you do a lot of short trips, drive spiritedly, or live in a harsh climate, many experts recommend changing the oil every 5,000-7,500 miles or every 6 months.

Where can I find the electronic oil level sensor reading?

You can check your oil level through the iDrive system. Navigate to “Vehicle Info,” then “Vehicle Status,” and finally “Engine Oil Level.” The system will typically take a few minutes to measure while the engine is warm and idling, or after a short drive.

Final Thoughts on Your N55’s Lifeline

The engine oil is truly the lifeline of your 2013 BMW 335i’s N55 engine. Understanding the specific requirements, from the crucial BMW LL-01 approval to the correct viscosity of 5W-30 or 5W-40, empowers you to make informed decisions for its care. Whether you choose to perform your own oil changes or entrust it to a professional, using the right 2013 BMW 335i oil type is non-negotiable for maintaining performance and extending the life of your prized vehicle.

By following these guidelines, choosing quality components, and staying vigilant about preventative maintenance, you’ll ensure your 335i continues to deliver that exhilarating driving experience for years to come. Remember, a little attention to detail now can save you from significant headaches and expenses down the road. Drive smart, maintain well, and enjoy the ride!

Robert Lozano
Latest posts by Robert Lozano (see all)

Similar Posts