Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Honda Ridgeline Fluid Capacities
OEM fluid capacity chart from the factory service manual for the 2018-2019 (2018-2019).
Quick Answer
Air Cond Compressor Oil
4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
Automatic Transmission Fluid
3.30 QTS. (3.12 L) — HONDA Automatic Transmission Fluid ATF DW-1 Note: Using a transmission fluid other than HONDA ATF DW-1 may adversely affect the operation and durability of your vehicle's transmission, and damage the transmission. Any damage caused by using a transmission fluid that is not equivalent to Honda ATF DW-1 is not covered by Honda's new vehicle warranty.
Brake Fluid
— HONDA Heavy Duty Brake Fluid DOT 3 Note: Fill to line on reservoir.
Differential Gear Oil
1.92 QTS. (1.81 L) — HONDA DPSF-II
Engine Coolant
1.88 GALS. (7.11 L) — HONDA Long-Life Antifreeze/Coolant Type 2 Note: This coolant is pre-mixed with 50/50 antifreeze and water. Never add straight antifreeze or plain water. If Honda antifreeze/coolant is not available, you may use another major-brand non-silicate coolant as a temporary replacement. Make sure it is a high-quality coolant recommended for aluminum engines.
Engine Oil
5.40 QTS. (5.11 L) — Genuine HONDA Motor Oil 0W-20 or API premium grade - SAE 0W-20 Detergent Oil Note: You may use a synthetic motor oil if it displays the API Certification Seal, and it is the proper weight.
Transfer Case Fluid
0.45 QTS. (0.42 L) — API GL 4 or GL 5, SAE 90 or SAE 80-90W Hypoid Gear Oil
Notes
- →Approximate capacity.
- →Using a transmission fluid other than HONDA ATF DW-1 may adversely affect the operation and durability of your vehicle's transmission, and damage the transmission. Any damage caused by using a transmission fluid that is not equivalent to Honda ATF DW-1 is not covered by Honda's new vehicle warranty.
- →Fill to line on reservoir.
- →This coolant is pre-mixed with 50/50 antifreeze and water. Never add straight antifreeze or plain water. If Honda antifreeze/coolant is not available, you may use another major-brand non-silicate coolant as a temporary replacement. Make sure it is a high-quality coolant recommended for aluminum engines.
- →You may use a synthetic motor oil if it displays the API Certification Seal, and it is the proper weight.
- →Follow the Manufacturer's Instructions for the mixture ratio.
This vehicle's factory manual
2018 Honda Ridgeline: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Related for Your 2018 Honda Ridgeline
Frequently Asked Questions
- What are the fluid capacities for a 2018 Honda Ridgeline?
- The 2018 Honda Ridgeline fluid capacities are: Air Cond Compressor Oil: 4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity., Automatic Transmission Fluid: 3.30 QTS. (3.12 L) — HONDA Automatic Transmission Fluid ATF DW-1 Note: Using a transmission fluid other than HONDA ATF DW-1 may adversely affect the operation and durability of your vehicle's transmission, and damage the transmission. Any damage caused by using a transmission fluid that is not equivalent to Honda ATF DW-1 is not covered by Honda's new vehicle warranty., Brake Fluid: — HONDA Heavy Duty Brake Fluid DOT 3 Note: Fill to line on reservoir., Differential Gear Oil: 1.92 QTS. (1.81 L) — HONDA DPSF-II, Engine Coolant: 1.88 GALS. (7.11 L) — HONDA Long-Life Antifreeze/Coolant Type 2 Note: This coolant is pre-mixed with 50/50 antifreeze and water. Never add straight antifreeze or plain water. If Honda antifreeze/coolant is not available, you may use another major-brand non-silicate coolant as a temporary replacement. Make sure it is a high-quality coolant recommended for aluminum engines., Engine Oil: 5.40 QTS. (5.11 L) — Genuine HONDA Motor Oil 0W-20 or API premium grade - SAE 0W-20 Detergent Oil Note: You may use a synthetic motor oil if it displays the API Certification Seal, and it is the proper weight., Transfer Case Fluid: 0.45 QTS. (0.42 L) — API GL 4 or GL 5, SAE 90 or SAE 80-90W Hypoid Gear Oil.
- How much engine oil does a 2018 Honda Ridgeline take?
- Engine oil capacity depends on the engine and whether the filter is changed. Check the applicable manual for your exact vehicle and service procedure before filling.