Oil Change Guide: 2026 Harley-Davidson CVO Road Glide FLTRXSE

Harley-Davidson CVO Road Glide FLTRXSE · 2026 · Oil Changes

Oil Change Guide: 2026 Harley-Davidson CVO Road Glide FLTRXSE

Quick Reference Table

Spec	Value	Source
Engine	Milwaukee-Eight 117 (1,923cc, air-cooled with liquid-cooled heads)	Harley-Davidson
Frame Platform	Touring (FL frame with Shark Nose fairing)	Harley-Davidson
Oil Type	SAE 20W-50 Full Synthetic (Harley-Davidson SYN3 or Formula+ Synthetic)	H-D CVO Service Manual
Oil Capacity (with filter)	4.5 quarts (144 oz) — M-117 CVO spec	H-D Service Manual
Oil Capacity (no filter)	4.0 quarts (128 oz)	H-D Service Manual
OEM Oil Filter	Harley-Davidson 63731-99A	H-D Parts Catalog
Aftermarket Filter Alternatives	K&N KN-170, WIX 57089XP, HiFloFiltro HF204, Amsoil EA79	Cross-reference
Drain Plug Socket	3/8 inch hex (10mm Allen)	H-D Service Manual
Drain Plug Torque	14-18 ft-lbs	H-D Service Manual
Drain Plug Washer	Copper crush washer, replace every change	H-D Service Manual
Oil Filter Install	Hand-tighten plus 3/4 turn after gasket contact	H-D Service Manual
Service Interval	5,000 miles (CVO premium models benefit from more frequent changes)	H-D Owner Manual

Difficulty and Time Estimate

Difficulty Level: Beginner to Intermediate (1 out of 5)
Estimated Time: 45-60 minutes (first-timer: 60-75 min)
Best Done: On a warm engine, bike level on a jack or lift

Complete Tool List

Tool	Size/Type	Purpose
Allen/hex wrench	3/8 inch (10mm)	Remove drain plug
Torque wrench	10-25 ft-lb range, 3/8 inch drive	Torque drain plug to spec
Ratchet	3/8 inch drive	General use
Oil filter wrench	Cap-style (76mm 14-flute) or strap-type	Remove old filter
Oil drain pan	Minimum 6-quart capacity	Catch used oil
Funnel	Standard or motorcycle-specific	Add new oil cleanly
New oil filter	OEM 63731-99A or aftermarket equivalent	Replace old filter
Drain plug washer	Copper crush washer (new, each change)	Seal drain plug
Clean rags/shop towels	Several	Cleanup
Cardboard or ground cover	One piece	Protect floor
Jack or lift	Motorcycle-rated, with jack stands	Elevate bike safely

Step-by-Step Instructions

Step 1: Warm the Engine

Start your CVO Road Glide and run for 5-10 minutes. The M-117 engine with its liquid-cooled heads warms thoroughly for complete drainage. Park on level ground and let sit for 5 minutes.

Step 2: Position and Elevate the Bike

The CVO Road Glide is a heavy touring machine at approximately 890 lbs. Use a motorcycle-rated lift or jack with jack stands. Ensure the bike is level.

Step 3: Remove the Oil Fill Cap

Remove the oil fill cap/dipstick from the right side oil tank. On Road Glide models, access is behind the right side panel area. This allows air in for complete drainage.

Step 4: Position the Drain Pan

Use a 6-quart minimum drain pan beneath the drain plug. The CVO M-117 holds more oil than standard touring models.

Step 5: Remove the Drain Plug

Using a 3/8 inch hex wrench, loosen the drain plug counterclockwise. Remove by hand for the last turns, ready for warm oil.

Warning: Oil may be hot. Wear gloves and eye protection.

Step 6: Drain the Oil Fully

Allow 10-15 minutes for full drainage. The larger M-117 displacement takes slightly longer to empty. Inspect drain plug and oil for debris.

Step 7: Replace the Drain Plug Washer

Remove the old copper crush washer and replace with a new one. Never reuse — single-use only.

Step 8: Reinstall the Drain Plug

Clean threads, install with new washer, hand-tighten, torque to 14-18 ft-lbs.

Do NOT over-torque. Stripped oil tank threads are expensive to repair.

Step 9: Remove the Old Oil Filter

Locate the oil filter on the oil tank. Position the drain pan beneath. Wrench to loosen, then hand-spin off. Check that the old gasket came off with the filter.

Step 10: Prepare the New Filter

Coat the new filter rubber gasket with clean 20W-50 synthetic oil
Confirm the old gasket was removed from the mounting surface
Do NOT pre-fill — mounts from below/spill risk

Step 11: Install the New Oil Filter

Thread by hand until the gasket contacts the seat. Tighten an additional 3/4 turn by hand.

Hand-tighten only. No tools.

Step 12: Add New Oil

Pour approximately 4.0 quarts of SAE 20W-50 full synthetic motorcycle oil. Use H-D SYN3 (full synthetic) or Formula+ Synthetic. Ensure JASO MA/MA2 rating.

CVO Recommendation: Full synthetic oil is highly recommended for these premium 117 engines, especially under touring loads and high ambient temperatures.

Step 13: Verify the Oil Level

Rest the fill cap on the threads without tightening
Start the engine, idle 2-3 minutes
Shut off, wait 1-2 minutes
Check the dipstick with bike level — between Add and Full marks
Add in 1/4 cup increments if low, rechecking each time
Tighten fill cap when correct

Step 14: Final Checks

Check leaks at drain plug and filter
Carefully wipe any oil from CVO premium paint surfaces and chrome Shark Nose fairing
Reset maintenance reminder on the CVO infotainment display
Dispose of used oil properly (see below)

Tips, Warnings and Common Mistakes

Helpful Tips

Premium oil for premium motorcycle: CVO Road Glide uses SYN3 full synthetic — this is not optional for optimal M-117 performance.
Protect the fairing: The Shark Nose fairing makes the CVO Road Glide distinctive. Take care not to drip oil on painted surfaces.
Frequent changes: The 117 cubic-inch engine under premium CVO tuning benefits from oil changes every 3,000-5,000 miles.
Record everything: CVO ownership documentation adds significant resale value. Keep thorough records.

Warnings

NEVER use automotive oil with friction modifiers — clutch slippage results.
Do NOT over-torque drain plug — aluminum tank threads are vulnerable.
Full synthetic is strongly recommended for CVO models.

Common Mistakes to Avoid

Mistake	Consequence	How to Avoid
Using mineral oil on CVO M-117	Sub-optimal protection on premium engine	Use SYN3 full synthetic
Over-torquing drain plug	Stripped threads	14-18 ft-lbs with torque wrench
Reusing drain washer	Oil leaks	Replace every change
Using car oil	Clutch damage	JASO MA/MA2 required
Not checking level after fill	Engine damage risk	Start, wait, recheck dipstick
Double-gasketing filter	Major oil leak	Verify old gasket removed

Oil Disposal

Never pour used oil down drains, into trash, or on the ground.

Seal in a clean container (empty oil jugs work perfectly)
AutoZone, O'Reilly, Advance Auto, NAPA — all accept used oil and filters free
Municipal recycling and hazardous waste centers also accept
Never mix with other automotive fluids

Verification Notes for 2026 Model Year

Spec	Known Value	Notes
Oil capacity	4.5 qts (with filter)	M-117 CVO spec, verify for 2026
Oil type	SAE 20W-50 Full Synthetic	H-D SYN3 recommended
Drain plug tool	3/8 inch hex (10mm Allen)	Standard Touring
Drain plug torque	14-18 ft-lbs	Confirm in owner manual
Oil filter	63731-99A / KN-170	Standard Touring filter
Oil fill location	Right side behind panel	Specific to Road Glide FL frame
Service interval	5,000 miles	CVO may benefit from 3,000-mile changes

To verify: Consult your 2026 CVO Road Glide owner's manual or H-D CVO dealer.

Guide prepared based on Milwaukee-Eight 117 CVO service manual specifications and Harley-Davidson OEM recommendations. Always verify against your specific owner's manual before performing maintenance.