Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2018 Ridgeline.
The 2018 Honda Ridgeline is a truck powered by a 6-speed automatic transmission that achieves EPA fuel economy ratings of 18/25/21 mpg, with engine oil capacity specified at 5.7 quarts using 0W-20 API viscosity. This model year carries 8 recalls on record, with total owner complaints reaching 157, the Electrical System cited as the primary concern among drivers. Across the Ridgeline's complaint history spanning 2003 to 2026, this places 2018 below the peak of 333 complaints logged in 2017 yet above the model's lowest point of just 2 complaints recorded in 2015, suggesting moderate but not minimal reliability concerns relative to the nameplate's overall trajectory.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 48 · 620 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic 6-spd |
| Overall length | 209.8 in |
| Overall width | 78.7 in |
| Overall height | 70.9 in |
| Wheelbase | 125.2 in |
| Curb weight | 4442 lb |
| Track (front / rear) | 66.1 / 66.5 in |
| Weight distribution (front / rear) | 58/42 |
| EPA city / highway / combined | 18 / 25 / 21 mpg |
| Drivetrain | All-Wheel Drive |
| Recommended fuel | Regular Gasoline |
0–60 mph, quarter-mile, horsepower and torque from independent road tests.
Independent road tests for the Ridgeline of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.
| Year | Trim / engine | 0–60 | ¼ mile | HP | Drivetrain |
|---|---|---|---|---|---|
| 2017 | RTL-E 3.5L V6 | 6.40 sec | 15.00 sec | 280 hp | AWD |
| 2017 | Black Edition 3.5L V6 | 6.60 sec | 15.20 sec | 280 hp | AWD |
| 2017 | RTL-E 3.5L V6 | 7.30 sec | 15.70 sec | 280 hp | AWD |
| 2019 | RTL-E (5'4" Bed) 3.5L V6 | 6.60 sec | 15.20 sec | 280 hp | AWD |
| 2019 | RTL (5'4" Bed) 3.5L V6 | 6.90 sec | 15.40 sec | 280 hp | AWD |
| 2019 | Black Edition (5'4" Bed) 3.5L V6 | 7.20 sec | 15.60 sec | 280 hp | AWD |
| 2021 | Sport HPD (5'4" Bed) 3.5L V6 | 6.20 sec | 15.00 sec | 280 hp | AWD |
| 2021 | Sport HPD (5'4" Bed) 3.5L V6 | 6.30 sec | 14.80 sec | 280 hp | AWD |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 5.7 qt of 0W-20 API engine oil, DOT 3 brake fluid. Torque lug nuts to 94 ft-lbs. The firing order is 1-4-2-5-3-6.
| Automatic Transmission Fluid | ATF |
| Automatic Transmission Fluid Capacity | 3.3 |
| Brake Fluid | DOT 3 |
| Differential Gear Oil Capacity | 3.8 qt |
| Engine Coolant | Use Honda Type 2 Antifreeze |
| Engine Coolant Capacity | 7.5 |
| Engine Oil | 0W-20 · API |
| Engine Oil Capacity | 5.7 qt |
| Crankshaft Position (CKP) Sensor Bolt(s) | 9.0 ft-lbs |
| Camshaft Position (CMP) Sensor Bolt(s) | 3.0 ft-lbs |
| Camshaft Sprocket and/or Gear Bolt(s) | 68.0 ft-lbs |
| Engine Coolant Temperature (ECT) Sensor Bolt(s) | 9.0 ft-lbs |
| Oxygen (O2S) Sensor Bolt(s) | 33.0 ft-lbs |
| Knock Sense (KS) Bolt(s) | 16.0 ft-lbs |
| Engine Flywheel Bolts | 55.0 ft-lbs; |
| Exhaust Manifold to Cylinder Head Bolts | 24 ft-lbs |
| Lug Nuts | 94 ft-lbs |
| Cylinder Firing Order | 1-4-2-5-3-6 |
| Curb Idle Speed (No Load) | 680 rpm |
| Curb Idle Speed Variance (No Load) | 50 rpm |
| Curb Idle Speed (Secondary Under Load) | 680 rpm |
| Curb Idle Speed Variance (Secondary Under Load) | 50 rpm |
| Spark Plug Manufacturer | Honda |
| Spark Plug Gap | .039 - .043 in |
| Spark Plug Torque | 16 ft-lbs |
| Refrigerant | R1234yf |
| Refrigerant Capacity | 1.25-1.40 lbs |
| Oil Type | RL85HM |
| Oil Capacity | 4.00-5.00 oz |
| Standard BCI Group Number | 48 |
| Standard BCI Cranking Performance | 620 cca |
| Regulated Fuel System Pressure (With Vacuum) | 57.0 |
| Fuel Pump Pressure Minimum | 60.0 |
| Fuel Pump Pressure Maximum | 67.0 |
| Engine Compression | 135 |
| Brake Caliper Bolt to Carrier Torque | Front: 53; Rear: 25 |
| Brake Caliper Carrier to Hub Bolt Torque | Front: 101; Rear: 65 |
| Vented Rotor Minimum Thickness for Replacement | Front: 1.024; Rear: .354 |
| Variation from Parallelism Thickness Variation | .0006 |
| Maximum Rotor Runout | .0016 |
| Maximum Drum Diameter | Parking Brake Drum: 8.307 |
| 1 | 15.0 ft. lbs. | 15 ft. lbs |
| 2 | 90.0 | |
| 1 | 48.0 ft. lbs., Step 2: 60 | 48 ft. lbs |
| 1 | 11MM Bolts | 30 ft. lbs |
| 2 | 11MM Bolts | 47 degrees |
| 3 | 36.0 | |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
The 2018 Ridgeline represents the second model year of the second generation, following a 2017 launch year that recorded 333 complaints and 163 TSBs. The 2018 figures show meaningful improvement at 157 complaints, 8 recalls, 5 investigations, and 113 TSBs, though 2019 rebounded to 230 complaints and 12 recalls, indicating the generation had not yet stabilized. The leading complaint categories for 2018 were Electrical System (34), Back Over Prevention (22), Engine (18), and Fuel/Propulsion System (17), with three crash complaints and one fire complaint reported; the data does not specify root causes for these issues. Compared to the first generation's 2006-2014 arc — which peaked at 240 complaints in its debut year before settling into the 24-45 range — the second generation's trajectory remains more volatile through 2019. The 2018 model sits at a local low point between two higher-complaint years, suggesting Honda addressed some launch issues but new ones emerged. For a used buyer, 2018 is a reasonable choice within this generation, but verify Electrical System and Back Over Prevention recalls have been completed and budget for potential fuel or engine concerns.
All 157 complaints on record, top 8 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 8 campaigns on record for this vehicle.
Honda (American Honda Motor Co.) is recalling certain 2017-2019 Ridgeline trucks. Exposure to acids, such as from car wash soaps, can result in the fuel pump feed port cracking. Remedy: Honda will notify owners, and dealers will replace the fuel pump, if necessary, and install a fuel pump cover, free of charge. The recall began March 14, 2019. Owners may contact…
Honda (American Honda Motor Co.) is recalling certain 2018 Honda Pilot and Ridgeline vehicles and 2018 Acura MDX vehicles. The front driver and passenger powered seats in the Honda vehicles and the driver powered seats… Remedy: Honda will notify owners, and dealers will replace the driver seat frame assembly in Acura MDX vehicles, and replace the driver and front passenger seat slide rail frames in Honda…
Showing 5 of 113 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| ATI&03262026905 | 2026-03-26 | Electrical System | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2019… |
| ATI&03112026902 | 2026-03-11 | Electrical System | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2019… |
| ATI&02242026902 | 2026-02-24 | Electrical System | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2019… |
| ATI&01202026901 | 2026-01-20 | Visibility/Wiper | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2019… |
| ATI&01052026901 | 2026-01-05 | Electrical System | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017-2019… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
5.7 qt of 0W-20 API, per the factory manual.
NHTSA lists 8 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 18 city / 25 highway / 21 combined mpg.