How to Change the Oil in a 2015 Honda CRF150R

Shop parts for a 2015 Honda CRF150R Dirt Bike.

Changing the engine oil in your 2015 Honda CRF150R is a crucial part of routine maintenance that helps ensure optimal engine performance and longevity. This model features separate compartments for the engine oil and transmission oil, both of which should be maintained according to your riding conditions and Honda’s recommendations. This how-to, proprietary to MotoSport.com, guides you through the process with specific call-outs for the 2015 CRF150R.

Tools and Materials Needed

  • 8mm and 10mm sockets or wrenches
  • Torque wrench (3/8 inch drive recommended; capable of 16 ft-lb range for transmission bolt)
  • Drain pan
  • Funnel (small, clean, and ideally with a flexible tip)
  • Clean rags or paper towels
  • Engine oil (Honda recommends 10W-40 motorcycle-specific oil)
  • New oil filter (optional, but recommended)
  • Replacement O-ring for the oil filter cover if necessary
  • Gloves
  • Cardboard or newspaper to protect your workspace
  • Goggles and other safety gear as preferred

Preparation

  • Start with a warm engine. Idle the bike for about 5 minutes. This helps the oil flow out more freely along with any contaminants.
  • Place cardboard or newspapers under your work area to prevent any spills on your floor.
  • Set the bike upright (not on its side stand) for accurate draining and refilling.

Step-by-Step Oil Change Instructions

  1. Remove the Skid Plate (if equipped)
    If your CRF150R has a skid plate or engine guard, remove it using your socket/wrench to access the drain bolts.
  2. Locate Oil Drain Bolts
    The CRF150R uses separate drain bolts for engine oil and transmission oil. Refer to your manual or the underside of your engine:
    • The engine oil drain bolt is under the engine (right hand side).
    • The transmission oil drain is on the other side (left hand side).
  3. Drain the Engine Oil
    • Place your drain pan under the engine oil drain bolt.
    • Carefully loosen and remove the engine oil drain bolt. Take care not to lose the crush washer.
    • Allow the oil to drain completely. You can rock the bike gently to help remove all old oil.
    • Inspect the drain bolt and washer for wear. Replace washer if needed.
  4. Change the Oil Filter (Recommended)
    • Remove the oil filter cover using the appropriate size socket.
    • Pull out the old filter, noting the orientation.
    • Check the O-ring on the cover for damage or pinching. Replace if necessary to prevent leaks. On this model, the O-ring can sometimes pinch and leak if not seated properly .
    • Install the new filter in the same direction as the old one. Lightly oil the filter gasket.
    • Reinstall the cover, torque bolts to manufacturer specs.
  5. Reinstall the Engine Oil Drain Bolt
    • Clean the area around the bolt hole. Dab fresh oil on the bolt threads.
    • Reinstall the bolt with the crush washer and torque to Honda specifications (refer to your manual).
  6. Add New Engine Oil
    • Remove the engine oil fill cap/dipstick.
    • Use a funnel and add the recommended amount of fresh oil (refer to your owner’s manual for exact volume).
    • Keep the funnel elevated above the opening for a consistent pour .
    • Wait a moment for oil to settle, then check oil level–add as needed.
  7. Check for Leaks and Finish Up
    • Start the engine and let idle for 1-2 minutes. Check the oil level and look for signs of leaks at the drain bolt and filter cover.
    • Shut off the engine, wait a minute, then recheck oil level; add oil if needed.
    • Replace the fill cap and wipe any spills.
    • Reinstall skid plate if removed.

Specific Call-Outs for 2015 Honda CRF150R Owners

  • Engine and Transmission Oil are Separate: Do not confuse the two drain/fill points. The engine oil is on the right, transmission on the left .
  • O-Rings Prone to Pinching: Always inspect the filter cover O-ring to avoid leaks. An improperly seated O-ring is a common cause of dripping oil .
  • Oil Quantity is Small: The CRF150R requires a relatively small volume of oil (reference your manual for exact fill). Do not overfill.
  • Proper Torque is Crucial: Stripped drain bolts are a common pitfall. Always use a torque wrench and adhere to Honda’s specs (typically around 16 ft-lb for transmission drain, check manual for engine) .
  • Check Oil After First Ride: After changing the oil and test riding, recheck the oil level and inspect for leaks.
  • Use Motorcycle-Specific Oil: Avoid automotive oils as they may not meet the requirements of your CRF150R’s engine and transmission.

MotoSport.com Pro Tip

  • Order extra crush washers and an O-ring for your next change; both are inexpensive but essential.
  • Always keep your work area clean to minimize dirt entering the engine.

Conclusion

The Honda CRF150R is known for its high-revving, race-ready engine, so frequent and proper oil changes are vital to maintain performance and reliability. If you’re unsure or lack tools, consult a qualified mechanic or your Honda dealer. For all your CRF150R oil change parts and supplies, trust MotoSport.com to keep your bike running at its best.

Related Shopping Categories

Shop Motor Oil for a 2015 Honda CRF150R Dirt Bike.

Shop Oil Filters for a 2015 Honda CRF150R Dirt Bike.

Shop Oil Drain Pans for a 2015 Honda CRF150R Dirt Bike.

Shop Tools for a 2015 Honda CRF150R Dirt Bike.

Shop Oil Fillers and Drain Plugs for a 2015 Honda CRF150R Dirt Bike.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.