How to Change Your Harley-Davidson Softail's Oil: A Step-by-Step Guide
Why Regular Oil Changes Matter for Your Softail
Oil keeps your Softail's engine running smoothly. Over time, oil breaks down and gets dirty, which means your engine has to work harder. Changing your oil on a regular schedule helps your bike run better and last longer. Clean oil reduces friction inside the engine, keeps parts from wearing out too fast, and helps your Softail maintain its power and performance.
Most Softail owners change their oil every 1,000 miles or once a year, whichever comes first. Check your owner's manual for the exact schedule for your model year. Sticking to this schedule is one of the best things you can do to protect your investment and keep your bike on the road.
What You'll Need
Before you start, gather these items so you have everything within reach:
- New oil (the right type and amount for your Softail model)
- A new oil filter
- An oil drain pan
- Wrenches or sockets that fit your drain plug and filter
- An oil filter wrench
- Shop towels or rags
- A jack and jack stands (to lift your bike safely)
- Newspaper or cardboard (to protect your work area)
Check your owner's manual to find out what type of oil your specific Softail model needs. Different model years and engine sizes may require different oil weights. Using the wrong oil can affect how your engine runs and how long it lasts. Most Harley-Davidson Softails use synthetic or synthetic blend oils, but always verify this in your manual before you purchase anything.
Getting Your Bike Ready
Start by running your engine for a few minutes. Warm oil flows better than cold oil, which means it will drain more completely. Let it warm up, then turn off the engine and wait about five minutes. This gives the oil time to start cooling but keeps it warm enough to flow easily. Never work on a hot engine—you could burn yourself on hot metal or hot oil.
Place your bike on a level surface. Use a jack and jack stands to lift the bike safely. Never work under a bike supported only by a jack. A jack can fail, and a falling motorcycle can cause serious injury. Make sure your jack stands are rated for your bike's weight and positioned on solid frame rails or designated lift points.
Spread newspaper or cardboard under your work area to catch any spills. This protects your garage floor and makes cleanup easier. Old oil can stain concrete and is bad for the environment, so containing it is important.
Draining the Old Oil
Locate the oil drain plug on the bottom of your engine. It's usually a bolt that sticks down from the lowest part of the engine case. Place your drain pan underneath it to catch the old oil. Position the pan so it's directly under the plug—old oil can splash, and you don't want it all over your garage floor.
Use the right wrench to loosen the drain plug by turning it counterclockwise. Once it's loose enough, carefully unscrew it by hand. Be careful—the oil may still be warm even after waiting a few minutes. If it's too hot to touch, wait a bit longer or use a towel to protect your hand.
Let all the old oil drain into the pan. This may take several minutes. You'll notice the flow starts fast and then slows down. Once the dripping slows to just a few drops, you're ready to move on. Don't rush this step—the more old oil you drain out, the better your fresh oil will work.
Wipe the drain plug clean with a shop towel. If your bike uses a crush washer (a small metal ring), replace it with a new one. A crush washer creates a tight seal and should only be used once. Screw the drain plug back in by hand first, then tighten it with your wrench. Don't over-tighten it—you just want it snug enough that it won't leak.
Replacing the Oil Filter
Find your oil filter. On most Softails, it's located on the side of the engine. Consult your owner's manual if you're not sure where it is on your model. The filter is usually cylindrical and about the size of a soda can, though it can vary depending on your year and model.
Place your drain pan underneath the filter. Use an oil filter wrench to loosen it by turning counterclockwise. Once it's loose, unscrew it by hand. Some oil will drip out, so keep the pan positioned underneath. This is normal and expected—the filter holds some oil inside it.
Before installing the new filter, apply a thin layer of new oil to the rubber gasket (the ring on top of the filter). This helps create a good seal and makes it easier to remove the filter next time. Use your finger to wipe a small amount of fresh oil around the gasket—you only need a thin coat, not a thick one.
Screw the new filter on by hand until the gasket touches the engine. Then turn it another three-quarters of a turn. You should be able to tighten it by hand—don't use the wrench for this step. Over-tightening the filter can damage it and make it hard to remove later. Hand-tight is all you need.
Adding New Oil
Remove your oil filler cap on top of the engine. It's usually labeled and easy to spot. Pour in the amount of new oil recommended in your owner's manual. Pour slowly and check the level as you go. Rushing this step can lead to overfilling, which can cause problems with your engine.
Use your dipstick or sight glass to check the oil level. Add oil until it reaches the full mark. Don't overfill it—too much oil can damage your engine just as much as too little. If your Softail has a sight glass (a small window on the side of the engine), look at it from the side to see where the oil level sits. If it has a dipstick, pull it out, wipe it clean, put it back in, and pull it out again to get an accurate reading.
Screw the filler cap back on securely. Make sure it's tight so oil doesn't splash out while you're riding.
Checking Your Work
Start your engine and let it run for about 30 seconds. Check around the drain plug and filter for any leaks. If you see drips, turn off the engine and tighten the plug or filter a bit more. A small drip might just be residual oil on the outside, but a steady leak means something isn't tight enough.
Turn off the engine and wait a few minutes. Check the oil level again with your dipstick or sight glass. Top it off if needed. The level may be slightly lower after running the engine because the new oil circulates through the engine and filter. This is normal.
Disposing of Old Oil
Don't pour old oil down the drain or throw it in the trash. Old oil is toxic and harmful to the environment. Take it to a recycling center, auto parts store, or service station. Many places will take used oil for free, and some may even give you a small discount on new oil if you bring in your old oil.
If you're not sure where to take your old oil, search online for "used oil recycling near me" or call your local auto parts store. They can tell you where to go. Disposing of oil properly is quick and easy, and it's the right thing to do.
Key Takeaways
Changing your Softail's oil is a straightforward job that saves you money and keeps your bike healthy. Remember these important points: warm up your oil before draining, use the right type of oil for your model, replace the crush washer on the drain plug, hand-tighten the new filter, and never overfill. Always check for leaks after running the engine, and keep a record of when you changed your oil so you know when the next change is due. Regular oil changes are one of the best investments you can make in your Softail's longevity and performance.
Frequently Asked Questions
How often should I change my Softail's oil?
Most Harley-Davidson Softails need an oil change every 1,000 miles or once a year, whichever comes first. However, this can vary depending on your model year and how you ride. Always check your owner's manual for the exact schedule for your bike. If you ride in extreme conditions or very hot weather, you may need to change your oil more often.
What happens if I use the wrong type of oil?
Using the wrong oil can reduce your engine's performance and may cause damage over time. Different oil weights and types are designed to work with specific engines. Harley-Davidson engines are built to run on certain oils, and using something different can affect how your bike runs, how much power it makes, and how long the engine lasts. Always follow your owner's manual and use the oil type it recommends.
Can I change my Softail's oil without a jack and jack stands?
No, you should never work under your bike without proper support. A jack alone is not safe—it can fail and drop your bike on you, causing serious injury or death. Always use jack stands in addition to a jack. Position the stands on solid frame rails or designated lift points, and make sure they're rated for your bike's weight. Your safety is worth the small investment in proper equipment.
What should I do if oil is leaking after I finish?
If you notice a leak, turn off the engine and let it cool. Check the drain plug and filter to make sure they're tight. A small drip might just be residual oil on the outside of the engine, but a steady leak means something isn't sealed properly. Tighten the plug or filter a bit more and run the engine again to check. If the leak continues, stop and figure out what's wrong before riding your bike.