How to Change the Oil in a 2018 Honda CRF250L ABS

Shop parts for a 2018 Honda CRF250L ABS Dirt Bike.

Regular oil changes extend the life and performance of your 2018 Honda CRF250L ABS, making it a critical part of ownership. With the right tools and method, you can easily perform this maintenance yourself at home. The following guide is proprietary to MotoSport.com and walks you through each step, highlighting essential tools, exact specifications, crucial owner call-outs, and best practices for this specific model.

Tools & Supplies Needed

  • 1.6 quarts (1.5 liters) SAE 10W-30 oil (Honda recommends JASO T 903 standard MA, or API SG or higher, like Pro Honda GN4 10W-30)
  • Oil Filter (OEM or aftermarket e.g., Hiflofiltro HF112)
  • Oil Filter Gasket
  • Drain Plug Crush Washer
  • 8mm and 12mm sockets (preferably deep well)
  • Ratchet
  • Torque Wrench
  • Allen key (for OEM or aftermarket skid plate)
  • Drain pan
  • Funnel
  • Paper towels or rags
  • Gloves and safety glasses (recommended for safety)
  • Contact cleaner (optional, for cleaning)

Although Honda recommends replacing the crush washer and oil filter gasket with every oil change, experienced owners may reuse them a few times if in good condition. However, for warranty and best longevity, replacement each time is advised.

Preparation

  • Warm up the engine. Idle the motorcycle for 3-5 minutes to thin out the oil and ensure a complete drain. Turn off the bike and allow it to settle for a few minutes before starting the job.
  • If installed, remove the skid plate. An Allen key may be needed. The OEM plate has a direct access cutout, but some aftermarket plates may collect oil, making removal preferable.
  • Set up your worksite with a drain pan ready, tools organized, gloves on, and rags within reach to catch drips and wipe surfaces.

Step-by-Step Instructions

  1. Clean the Oil Fill Area. Before opening anything, spray contact cleaner or wipe the area around the oil fill and drain plug to prevent debris from falling into the engine.
  2. Remove the Oil Fill Cap. Twist off the oil fill cap–this allows the oil to drain faster and more completely.
  3. Drain the Old Oil.
    • Locate the drain bolt under the engine (usually toward the left side).
    • Using a 12mm socket, unscrew the drain bolt and let the oil flow into the pan. Watch for the crush washer and set aside for inspection or replacement.
    • Allow all oil to drain — this may take several minutes. Tip the bike upright to get the last bit if needed.
  4. Remove the Oil Filter.
    • With an 8mm socket, remove the three bolts securing the oil filter cover.
    • Pull off the cover, noting the spring behind it, and set aside.
    • Pull out the old oil filter and oil filter gasket. Inspect the gasket for wear; replace if needed.
    • Wipe out the filter cup and surrounding area with a rag.
  5. Install the New Filter & Gasket.
    • Insert the new oil filter (spring-side faces out; check your manual or compare to old filter orientation).
    • Replace the filter cover gasket if needed.
    • Gently snug cover bolts with your 8mm socket. Tighten to 9 ft-lbs (12 Nm) with a torque wrench for the cover. Over-tightening can crack the cover.
  6. Reinstall Drain Plug.
    • Replace crush washer with new if available. Install the drain bolt by hand first to avoid cross-threading.
    • Tighten bolt to 18 ft-lbs (24 Nm) with a torque wrench.
    • Wipe away any excess oil from the drain area.
  7. Pour in New Oil.
    • Place a funnel in the oil fill hole and pour in 1.6 quarts (1.5 liters) of SAE 10W-30 oil.
    • Replace the oil fill cap.
  8. Check Your Work.
    • Start the engine and let it idle for a few minutes.
    • Check for leaks at the drain plug and filter cover.
    • Turn off engine, wait a minute, then check the oil level using the dipstick or sight glass (clean and reseat fully before checking). Add oil as needed to bring to the correct mark.
  9. Dispose of Old Oil Properly.
    • Pour used oil into a sealed container and bring it to a recycling facility.

Specific Notes and Owner Call-Outs for the 2018 Honda CRF250L ABS

  • Follow recommended intervals: Change oil every 4,000 miles (6,400 km) or at least every 12 months, whichever comes first.
  • Use a torque wrench. The crankcase and filter cover are aluminum and prone to damage if over-tightened.
  • Spring orientation on oil filter. Double-check filter orientation—the spring must be behind the filter for correct installation.
  • Stock vs. aftermarket skid plates. Aftermarket skid plates can block drainage and make a mess; removal may be required for a clean job.
  • ABS variant implications. The process is identical for ABS and non-ABS versions—the ABS sensor wiring will not interfere with oil change tasks.
  • Riding in extreme dust or race conditions? Change the oil more frequently to protect engine internals.

Maintenance Tips

  • Keep spare crush washers and filter gaskets on hand to avoid delays at each service.
  • Always verify the engine oil level following the refill and after running the engine briefly.
  • If an oil change interval is exceeded or if the oil comes out unusually dark or smells burnt, inspect for further issues and monitor oil usage more closely.

MotoSport.com recommends following this guide for optimal engine life and reliability on your 2018 Honda CRF250L ABS.

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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.