The Softail Deluxe (FLSTN) was the chrome-and-whitewall Heritage-styled cruiser of the old hidden-shock Softail line, built 2010-2017 with the Twin Cam 103 (pre-2012 as Twin Cam 96). Its Nostalgia details - wide whitewall MT90B16/MU85B16 tires, full fenders and floorboards - sit on the same service schedule as every Twin Cam Softail: 2.8 L of 20W-50 in the oil tank with the filter, 0.95 L each for transmission and primary chaincase, 6R12 plugs and DOT 4 brake fluid every two years. The 2015 official owner's manual covers the final production years; the model was discontinued when the Softail chassis was redesigned for 2018 (the Deluxe name did not carry over). Hydraulic lifters mean there is no valve adjustment.
| Specification | Value | Source |
|---|---|---|
| Engine oil & filter | 1,000 mi first service, then every 5,000 mi (8,000 km) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Spark plug replacement | every 30,000 mi (48,000 km) or 2 years | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Brake fluid change | every 2 years | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Specification | Value | Source |
|---|---|---|
| Oil capacity (with filter) | 2.8 Loil tank with filter (3.0 US qt); refill initially 1.9 L then top up | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Oil type | Harley-Davidson H-D 360 (Screamin' Eagle SYN3 full synthetic acceptable) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Oil viscosity | SAE 20W-50 (H-D 360; SYN3 acceptable) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Final drive oil | transmission 0.95 L (1.0 qt); primary chaincase 0.95 L (1.0 qt) Lapproximate | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Brake fluid type (DOT) | DOT 4 | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Fuel capacity | 18.9 L5.0 US gal | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Specification | Value | Source |
|---|---|---|
| Spark plug | 16.3-24.4 Nu00b7m | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Specification | Value | Source |
|---|---|---|
| Battery | 12V, 330 CCA, sealed maintenance-free | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Headlight bulb | H4 60/55 W (H-D P/N 68329-03) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Spark plug | H-D 6R1212 mm | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Spark plug gap | 0.97-1.09 mm | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Specification | Value | Source |
|---|---|---|
| Front tire size | MT90B16, Dunlop D402FFLSTN; whitewall variant | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Rear tire size | MU85B16, Dunlop D402 | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Front tire pressure (solo) | 36 psi248 kPa cold | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
| Rear tire pressure (solo) | 40 psi276 kPa cold | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) |
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| Value | Source | Checked |
|---|---|---|
| Oil capacity (with filter): 2.8 L | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Oil type: Harley-Davidson H-D 360 (Screamin' Eagle SYN3 full synthetic acceptable) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Engine Lubrication, oil recommendation chart) | 2026-11-03 |
| Oil viscosity: SAE 20W-50 (H-D 360; SYN3 acceptable) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Final drive oil: transmission 0.95 L (1.0 qt); primary chaincase 0.95 L (1.0 qt) L | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Brake fluid type (DOT): DOT 4 | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Fuel capacity: 18.9 L | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Engine oil & filter: 1,000 mi first service, then every 5,000 mi (8,000 km) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Spark plug replacement: every 30,000 mi (48,000 km) or 2 years | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Brake fluid change: every 2 years | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Spark plug: 16.3-24.4 Nu00b7m | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Battery: 12V, 330 CCA, sealed maintenance-free | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Headlight bulb: H4 60/55 W (H-D P/N 68329-03) | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Spark plug: H-D 6R12 | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Spark plug gap: 0.97-1.09 mm | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Front tire size: MT90B16, Dunlop D402F | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Rear tire size: MU85B16, Dunlop D402 | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Front tire pressure (solo): 36 psi | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |
| Rear tire pressure (solo): 40 psi | 2015 Harley-Davidson Owner's Manual: Softail Models, 99469-15 (H-D Service Information Portal) (p. Specifications; Capacities Table 12) | 2026-11-03 |