What Size Wrench Do You Need for an Oil Change?

The size varies by vehicle: most oil drain plugs use a 13–17 mm six‑point socket (14 mm and 15 mm are especially common), some trucks/SUVs need 19 mm, and older or domestic models may use 1/2″, 9/16″, or 5/8″. Oil filter housings and caps can require separate tools, commonly a 64 mm 14‑flute cap (Toyota/Lexus spin‑on or canister) or sockets such as 24, 27, 32, or 36 mm for cartridge-style filters. Always confirm in the owner’s manual or service documentation for your exact engine.

Why There’s No One-Size-Fits-All

Automakers use different drain plug sizes, head shapes (external hex, internal hex/Allen, Torx), and oil filter systems (spin-on vs. cartridge housings). Even within a brand, engines differ by model year and displacement, and some newer models use plastic oil pans or quick-drain plugs that have unique procedures. That’s why the most reliable approach is to reference your specific engine and confirm before you wrench.

Common Oil Drain Plug Wrench Sizes by Manufacturer

The following list outlines typical drain plug head sizes seen in the field, organized by brand groups. Treat these as common patterns, not guarantees, and verify for your exact engine and year.

• Toyota/Lexus: Often 14 mm external hex; many models specify a new aluminum crush washer at each change.
• Honda/Acura: Commonly 17 mm external hex; some models use 14 mm.
• Nissan/Infiniti: Frequently 14 mm external hex.
• Mazda: Usually 17 mm, with some 14 mm applications.
• Subaru: Commonly 17 mm external hex.
• Hyundai/Kia: Often 17 mm; some models 14 mm.
• Ford (gasoline): 13 mm or 15 mm external hex are typical; certain late-model pans use specialty/plastic plugs with specific procedures.
• GM/Chevrolet/GMC/Buick: Frequently 15 mm; some older models use 5/8″.
• Chrysler/Dodge/Jeep/Ram: Often 13–15 mm; some older models use SAE sizes.
• Volkswagen/Audi: Commonly 19 mm external hex, but internal hex (6 mm or 8 mm) is also seen; verify before servicing.
• BMW/MINI: Often 17 mm external hex; some models use internal hex (8 mm).
• Mercedes‑Benz: Mix of 13–14 mm external hex and internal hex (8 mm), depending on engine family.
• Trucks and HD applications: Can range up to 19–21 mm or larger; check model‑specific specs.

Because model-year changes and engine variants are common, using the owner’s manual, a factory service manual, or an OEM parts lookup by VIN remains the best way to confirm your size before beginning the oil change.

Oil Filter Wrench or Socket Sizes You May Need

Oil filter removal often requires a different tool from the drain plug. Spin-on filters typically use a cap (cup) wrench sized to the filter’s diameter and flute count, while cartridge-style housings use a large hex socket. Here are widely used sizes and examples.

• Spin-on filter cap (cup) wrenches:
  – 64 mm, 14‑flute: Very common on Toyota/Lexus and many Asian spin-on filters.
  – 65/67 mm, 14‑flute: Seen on some Honda/Acura applications.
  – 74–76 mm, 14‑flute: Common across various domestic and Asian filters (Ford/GM/Nissan on some engines).
• Cartridge filter housing sockets (top or front-mounted canisters):
  – 24 mm: Chrysler 3.6L Pentastar and some others.
  – 27 mm: Common on several Mercedes and Ford cartridge housings.
  – 32 mm: GM Ecotec and some VW/Audi 2.0T applications.
  – 36 mm: BMW/MINI and various European makes.
  – Toyota/Lexus canister housings: Typically serviced with a 64 mm 14‑flute cap tool; many also accept a 3/8″ drive in the housing cap center for controlled removal.
• Strap or band wrenches: Universal options for stubborn spin-on filters when a precise cap size isn’t available.

Filter tooling varies even more than drain plug hardware. If you’re unsure, search by engine code or filter part number to match the correct cup size or socket before starting.

How to Find and Verify Your Exact Size

If you don’t have documentation handy, these steps help you identify the correct wrench or socket quickly and safely.

1. Check the owner’s manual or OEM service manual for drain plug and filter specifications.
2. Look up your vehicle by VIN on an OEM parts site to confirm drain plug thread size and washer type; cross‑check the filter part number for the correct cap size.
3. Use a metric six-point socket set (10–19 mm) and test-fit gently; avoid forcing a loose or tight fit to prevent rounding.
4. For internal hex (Allen) or Torx plugs, measure the key size (commonly 6–8 mm for internal hex) and use high-quality bits.
5. Inspect for special parts: plastic oil pans or twist‑lock plugs, and cartridge housings with specified torque and O‑ring service steps.

Taking a minute to verify sizing prevents stripped heads, cracked housings, and leaks—problems that can turn a routine job into a repair.

Torque, Washers, and Best Practices

Correct torque and fresh sealing hardware matter as much as the right wrench size. These guidelines cover the essentials most DIYers need to finish the job leak‑free.

• Typical drain plug torque ranges:
  – M12 plugs: about 20–25 ft‑lb (27–34 N·m).
  – M14 plugs: about 25–30 ft‑lb (34–40 N·m).
  Always confirm your exact spec; overtightening can strip aluminum pans.
• Cartridge filter housing caps: commonly 18–25 ft‑lb (25–34 N·m). Replace the large O‑ring and any small drain‑cap O‑rings exactly as directed; lubricate with fresh oil.
• Spin‑on filters: usually install by hand until the gasket contacts, then tighten 3/4 turn (or follow the filter maker’s printed instruction). Do not use a wrench to install unless specified.
• Crush washers: Replace aluminum/copper washers each change. Match the washer to the plug thread (e.g., M14 plug uses a 14 mm ID washer).
• Use six‑point sockets: They grip better and reduce rounding risk compared with twelve‑point sockets.
• Special plugs and plastic pans: Follow OEM procedures. Some plugs are single‑use or have unique locking features and low torque values.

A torque wrench and the right sealing parts are inexpensive insurance against leaks and damage, especially on aluminum or composite oil pans and plastic filter housings.

Quick Reference: Tools to Have Ready

Keeping a focused kit for oil changes helps you adapt to different sizes and designs without mid-job delays.

• Metric six‑point socket set (10–19 mm) and a few SAE sockets (1/2″, 9/16″, 5/8″).
• 3/8″ and 1/2″ drive ratchets; breaker bar for stubborn plugs.
• Torque wrench covering roughly 10–80 ft‑lb.
• Oil filter cap (cup) set covering common 64–76 mm sizes, plus a strap wrench.
• Internal hex (Allen) sockets (6–10 mm) and Torx set for European applications.
• New crush washer(s) matched to your drain plug, replacement O‑rings for cartridge housings.
• Drain pan, gloves, rags, funnel, and correct oil/filter for your engine.

With these basics on hand, you’ll be equipped for most mainstream vehicles, whether they use spin‑on filters or cartridge housings.

Summary

There isn’t a universal wrench size for oil changes. Most drain plugs take 13–17 mm (14 or 15 mm are very common), with some vehicles needing 19 mm or SAE equivalents. Oil filter tools vary widely—expect a 64 mm 14‑flute cap for many Toyota/Lexus filters and 24–36 mm sockets for cartridge housings on brands like Chrysler, Mercedes, BMW, GM, and VW/Audi. Confirm your vehicle’s specifications, use a six‑point socket and a torque wrench, and replace crush washers and O‑rings to ensure a clean, leak‑free service.

What tool do I need to do an oil change?

What you will need may vary between vehicles, but some of the most common oil change equipment and supplies are listed here:

1. Motor oil + oil filter.
2. Wheel ramps + chocks.
3. Safety glasses + gloves.
4. Ratchet + socket set.
5. Oil filter wrench + torque wrench.
6. Funnel + oil pan.
7. Clean rags + newspaper.

What socket do you need to change your oil?

Socket Wrench and Drain Plug Socket
You’ll need a socket wrench to remove the oil drain plug. The size of the socket depends on your car, so check your owner’s manual to find out what you need. A drain plug socket is usually included in a basic socket set.

What size wrench for oil change?

The size of wrench you need for an oil change varies by vehicle make and model, but a common size is 15mm for the oil drain plug. To ensure the correct fit, check the specific bolt size for your vehicle, as some may require other metric sizes like 13mm or 16mm, or SAE imperial sizes like 9/16″. You’ll also need the correct size wrench or socket for the oil filter, though a universal adjustable oil filter wrench can often work for various filters.
 
This video demonstrates how to remove an oil drain plug with a 15mm socket: 57sDIY Andrew FlockhartYouTube · Jan 20, 2024
For the Oil Drain Plug:

• Identify Your Vehicle’s Specs: Opens in new tabThe most accurate way to know the right size is to check your vehicle’s owner’s manual or look up the specific bolt size for your car’s year, make, and model. 
• Common Metric Sizes: Opens in new tabMany vehicles use a 15mm socket, while others might use a 13mm, 14mm, 16mm, or 17mm socket. 
• Common Imperial Sizes: Opens in new tabSome older vehicles or those from certain manufacturers may use imperial sizes like 9/16″. 
• Use a Socket or Wrench: Opens in new tabA 3/8″ drive ratchet with the correct size socket provides a secure fit and good leverage. 

For the Oil Filter:

• Oil Filter Wrench: A universal adjustable oil filter wrench is a good investment. It can adapt to grip and turn most filter sizes, saving you from having to buy multiple specialized wrenches. 
• Check for Clearance: Some oil filters are recessed and require a specific type of socket wrench for removal. 

What size is a standard oil drain plug?

There is no single “standard size” for an oil drain plug, as sizes vary by vehicle make and model. To find the correct size, you need to check your vehicle’s owner’s manual or measure your existing plug’s thread diameter (e.g., M12, M14) and the required wrench size for the head (e.g., 15mm, 17mm).
 
How to Determine Your Drain Plug Size

1. Check Your Owner’s Manual: This is the best first step to find the correct size specified for your vehicle. 
2. Measure Your Existing Plug:
   • Thread Diameter: Measure the widest part of the plug’s threads to get the metric (M) or standard (SAE) diameter (e.g., M12 means a 12mm thread diameter). 
   • Head Size: The head size (e.g., 17mm) is the measurement needed for the wrench or socket you’ll use to remove and install the plug. 
3. Use a Vehicle-Specific Parts Catalog: Websites for auto parts stores or manufacturers like Dorman Products and NAPA Auto Parts have tools to help you find the right drain plug by entering your vehicle’s year, make, and model. 

Common Size Examples
While not standard, here are some examples of common sizes: 

• Metric: M12 x 1.5, M12 x 1.75, M14 x 1.50.
• SAE (Imperial): 1/2-20.