| Attribute | Specification |
|---|---|
| Model Series | GL 1800 (GL18/20) |
| Production Years | 2018-2020 |
| Engine Type | 1,833cc Liquid-cooled horizontally opposed six-cylinder |
| Engine Oil | 10W-30 API SG+ (JASO T 903 MA) |
| Oil Capacity | 3.9 L (MT) / 4.6 L (DCT) |
| Tire Size (F/R) | 130/70R18 / 200/55R16 |
| Battery | YTZ14S |
| Spark Plug | NGK SILMAR8C9 |
The 2018-2020 Honda GL 1800 Gold Wing (GL18/20) represents a radical departure from its predecessors, most notably for the introduction of its double-wishbone front suspension system. This engineering feat decoupled the suspension stroke from the steering motion, reducing friction by 30% and allowing the engine to be moved forward for better weight distribution, effectively ending the era of traditional telescopic forks on Honda’s flagship tourer.
Engineering Deep Dive: The GL18/20 Evolution
The sixth-generation Gold Wing was designed under the philosophy of “Total Control.” By shedding nearly 40kg compared to the previous generation, Honda transformed the GL 1800 from a pure cruiser into a precision-touring machine. The 1,833cc engine features four valves per cylinder (Unicam) and a significantly more compact footprint. The integration of the 7-speed Dual Clutch Transmission (DCT) in this era further solidified its status as the pinnacle of long-distance motorcycle technology.
Maintenance Essentials
Maintaining the GL18/20 requires precision, particularly regarding its lubrication and electronic systems. At MotoSpecsLab, we emphasize the use of high-quality synthetic oils to protect the intricate valvetrain of the flat-six engine.
- Lubrication: Use 10W-30 API SG or higher. Note the capacity difference: the DCT model requires 4.6 liters due to the hydraulic requirements of the dual-clutch system, while the Manual Transmission (MT) requires 3.9 liters.
- Ignition: The SILMAR8C9 Iridium plugs are essential for maintaining the high-efficiency combustion required by the PGM-FI system.
- Chassis: Tire pressures are critical for handling stability. Maintain 36 psi (Front) and 41 psi (Rear) strictly.
Reliability & Performance
The GL18/20 series is renowned for its reliability, though owners should monitor the battery health closely. The YTZ14S battery powers an extensive array of electronics, including the Hill Start Assist (HSA) and the electronically controlled suspension. A steady voltage is paramount for the CAN-bus communication system to function without error codes.
Frequently Asked Questions
What is the recommended spark plug for the 2018-2020 Gold Wing?
The manufacturer specifies the NGK SILMAR8C9, which is a high-performance iridium plug designed for long service intervals and consistent ignition.
Can I use 10W-40 oil instead of 10W-30?
While 10W-40 may be used in warmer climates, Honda specifically recommends 10W-30 JASO MA for the GL18/20 to ensure optimal fuel efficiency and proper DCT shifting performance.
How often should I check the tire pressure?
Given the weight and touring nature of the GL 1800, tire pressure should be checked before every long-distance trip or at least once every two weeks to ensure the 2.5 bar (F) and 2.8 bar (R) standards are met.