🧪Fluid Capacities

Honda Ridgeline RTL Fluid Capacities

Factory manual fluid capacities for the Honda Ridgeline RTL. Exact capacities and specs extracted from the LEMON service manual archive.

Last updated: 2026-10-29 • Reading time: 8 min • By AllOEMManuals Editorial Team

Quick Answer

2020-2022 Honda Ridgeline RTL: 4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.

GenerationYearsTop spec
2020-20222020-20224.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
2018-20192018-20194.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
201720171.35 LBS. (0.61 KG) — HFO-1234yf (R-1234yf) Note: Approximate capacity.

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Honda Ridgeline RTL maintenance schedule

Factory Manual ConfirmationFluid Capacities

Know the exact fluid capacities job for your Honda Ridgeline RTL

2020-2022 Honda Ridgeline RTL: 4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.

Fluid type and capacity can change by engine, drivetrain, and transmission. Verify the exact branch before filling anything. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.

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2020-2022

2020-2022Open 2020 manual
Air Cond Compressor Oil4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
Air Cond Refrigerant1.35 LBS. (0.61 KG) — HFO-1234yf (R-1234yf) Note: Approximate capacity.
Automatic Transmission Fluid3.70 QTS. (3.5 L) — HONDA Automatic Transmission Fluid ATF - Type 3.1 or higher
Brake Fluid— HONDA Heavy Duty Brake Fluid DOT 3 Note: Fill to line on reservoir.
Differential Gear Oil1.92 QTS. (1.81 L) — HONDA DPSF-II
Engine Coolant1.96 GALS. (7.41 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 Oil5.40 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.
Fuel Tank19.50 GALS. (73.81 L)
Transfer Case Fluid0.45 QTS. (0.42 L) — HONDA HGO-1
Windshield Washer Fluid4.02 QTS. (3.8 L) — All Weather Windshield Washer Fluid Note: Follow the Manufacturer's Instructions for the mixture ratio.
Notes
  • →Approximate capacity.
  • →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.
Shop Exact Match on Amazon →Full Repair Guide →

2018-2019

2018-2019Open 2018 manual
Air Cond Compressor Oil4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
Air Cond Refrigerant1.35 LBS. (0.61 KG) — HFO-1234yf (R-1234yf) Note: Approximate capacity.
Automatic Transmission Fluid3.30 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 Oil1.92 QTS. (1.81 L) — HONDA DPSF-II
Engine Coolant1.88 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 Oil5.40 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.
Fuel Tank19.50 GALS. (73.81 L)
Transfer Case Fluid0.45 QTS. (0.42 L) — API GL 4 or GL 5, SAE 90 or SAE 80-90W Hypoid Gear Oil
Windshield Washer Fluid4.02 QTS. (3.8 L) — All Weather Windshield Washer Fluid Note: Follow the Manufacturer's Instructions for the mixture ratio.
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.
Shop Exact Match on Amazon →Full Repair Guide →

2017

2017Open 2017 manual
Air Cond Refrigerant1.35 LBS. (0.61 KG) — HFO-1234yf (R-1234yf) Note: Approximate capacity.
Automatic Transmission Fluid3.30 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 Oil1.92 QTS. (1.81 L) — HONDA DPSF-II
Engine Coolant1.88 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 Oil5.40 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.
Fuel Tank19.50 GALS. (73.81 L)
Transfer Case Fluid0.45 QTS. (0.42 L) — API GL 4 or GL 5, SAE 90 or SAE 80-90W Hypoid Gear Oil
Windshield Washer Fluid4.02 QTS. (3.8 L) — All Weather Windshield Washer Fluid Note: Follow the Manufacturer's Instructions for the mixture ratio.
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.
Shop Exact Match on Amazon →Full Repair Guide →

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Honda Ridgeline RTL Fluid Service Kit

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The 2 things people always forget

Long-Neck Funnel

Transmission and differential fill holes are recessed. A short funnel makes a mess.

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Fluid Extraction Pump

Removing old brake fluid from the reservoir without a pump contaminates the master cylinder.

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Fluids — Manual's Parts List

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One-Trip Shopping List

Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.

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Fluid Extraction Pump

Cleanly remove old fluids from reservoirs.

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Clean Shop Rags

Lint-free rags for cleaning dipsticks and spills.

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Multi-Purpose Funnel

Long-neck funnel for hard-to-reach fill points.

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Nitrile Gloves

Keep hands clean during multi-fluid maintenance.

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Project Essentials

Basic tool sets, gloves, and cleaning supplies for your Honda Ridgeline RTL so the job is ready when the parts arrive.

Frequently Asked Questions

Where is this data from?
Extracted directly from the LEMON factory service manual archive. Sources are cited per generation.
What fluid capacities does a Honda Ridgeline RTL use?
2020-2022 Honda Ridgeline RTL: 4.50 OZS. (0.13 L) — RL85HMS (POE) Note: Approximate capacity.
Why do fluid capacities vary by generation for the Honda Ridgeline RTL?
Different engine options, transmission types, and cooling system designs across model years change total fluid volumes. Always use the capacity listed for your exact year and engine code — do not guess across generations.

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Author & Review

Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.

Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.

Last updated: 2026-10-29

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