Oil Drain Plug Torque Specs and Common Mistakes to Avoid When Changing Engine Oil

Reviewed by

Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on August 4th, 2024

Reading Time: 6 minutes
Summary
  • The oil drain plug threads into a hole at the lowest point of the engine oil pan so that when it is removed during an oil change, just about all of the engine oil will drain out.
  • The torque specs for an oil drain plug with a large diameter can fall anywhere between 10 and 30 lbs ft. depending on the diameter of the threads; usually very near 20 lbs ft.
  • Overtightening the oil drain plug can cause it to stick to the oil pan, making it extremely difficult to remove.
  • Even when tightened normally, oil drain plug threads tend to stretch over time, and many vehicle specific oil change kits will come with a new oil drain plug.

Performing an oil change is one of the many tasks DIYers tend to tackle to save on labor. While vehicle owners with advanced technical knowledge may find this job easy enough, careless mistakes during a routine oil change can lead to disaster.

A common mistake that people tend to make is not knowing the right torque specifications when tightening the oil drain plug. Read on to find out more about proper torque specs.

Oil Drain Plug: The Basics

The oil drain plug threads into a hole at the lowest point of the engine oil pan so that when it is removed during an oil change, just about all of the engine oil will drain out.

Torque Specs for the Oil Drain Plug

The recommended torque specs for tightening an oil drain plug vary depending on a vehicle’s year, make, and model, the type of oil pan metal, and the size and pitch of the drain plug threads.

For example, the torque specs for an oil drain plug with a large thread diameter can fall anywhere between 10 and 30 lbs ft. but will usually fall between 18 and 25 lbs ft.

Experts claim that applying this amount of force using an oil drain plug torque wrench is enough to bring the plug’s rubber gasket close to the oil pan and seal the hole. Some oil drain plugs have copper gaskets, and some have built-in O-rings.

Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.

Pro Tip: You can get a torque wrench, set it to spec, and use it on the oil drain plug. Of course, there are many DIY folks who know how tight the oil drain plug should be without using a torque wrench and you may be one of them.

Common Issues Surrounding the Oil Drain Plug

The oil drain plug is a rather small component that can cause big problems once it fails. Always replace the oil drain plug if you can’t screw it all the way out with your fingers after loosening it with the wrench.

Stuck or Stripped Oil Drain Plug

Overtightening the oil drain plug can cause its threads to strip so that it turns around and around, making it extremely difficult to remove. Sometimes the oil pan will need to be replaced if you can’t get a thread-stripped oil drain plug out.

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Common Mistakes to Avoid When Changing Engine Oil

Aside from overtightening the oil drain plug, there are other mistakes DIYers tend to make while changing their engine oil. Here are some of the most common ones:

Mistake #1: Working with a Cold Engine

Oil won’t flow properly under cold temperatures. So if you forget to warm up the engine for at least five to 10 minutes before draining the oil, you can expect the process to take more time than usual. This is a minor mistake, but if you’re draining cold oil, be prepared for it to take more time.

Mistake #2: Reusing the Old Drain Plug Gasket

The oil drain plug gasket seals the plug when it connects to the oil pan. Depending on your vehicle, the gasket might be for single use only or reusable.

Most professionals recommend replacing the oil drain plug gasket after every oil change, especially if the gasket is made from copper that deforms upon tightening the plug.

Failure to use a new drain plug gasket can result in leaks, which can lead to oil starvation.

Mistake #3: Changing the Oil But Not Replacing the Oil Filter

The oil filter is responsible for trapping large particles that can contaminate the engine oil and damage critical mechanical parts. When you don’t change the filter, the old oil that is trapped in the filter contaminates the new oil, tremendously shortening the life of the new oil.

Mistake #4: Double-Gasketing the Oil Filter

When you get the oil filter off and in your hand, find out where the old oil filter gasket is. It may be stuck to the oil filter head, and if it is, you need to get it off of there before screwing the new filter on. This mistake happens a lot more than you’d think (see photo). | Image Source: Richard McCuistian

Mistake #5: Forgetting to Lubricate the Oil Filter Gasket

A dry oil filter gasket that comes into contact with the engine surface tends to ripple or tear, creating a small leak. Make sure to lubricate the oil filter gasket with fresh engine oil before installation.

Mistake #6: Using the Wrong Engine Oil or the Wrong Oil Filter

It’s important to follow your automaker’s recommended engine oil viscosity and API standards.

Using the wrong type of engine oil can result in major engine damage. In some cases, the damage can be irreversible.

Oil quantity is also another important factor to consider. Adding too little oil will cause the engine to warm up fast and eventually fail.

Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.

Pro Tip: Running the engine a quart low can sauce the engine oil to break down twice as fast.

To avoid such mistakes, always refer to your owner’s manual or the parts counter catalog for the right engine oil specifications.

Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.

Pro Tip: Remember: just because the filter looks the same and has the right threads, it may be different internally. Make sure the filter you’re using is exactly the right one for your engine.

Mistake #7: Forgetting to Install the Oil Cap

Forgetting to put the oil cap back on might seem like a silly mistake, but it does happen sometimes. On some engines that have the timing chain right underneath the oil filler cap, the timing chain can throw all the oil out of the engine in just a few miles and destroy the engine.

Key Takeaways

Oil changes can seem like a simple task to seasoned DIYers, but don’t become complacent and make mistakes. Always double-check everything.

It’s extremely important to know the correct oil drain plug torque specs for your vehicle to avoid over tightening the nut or damaging other related components.

Doing so can lead to oil leaks, which is the last thing you would want to deal with after getting an oil change.

The oil drain plug is a rather small component, but it holds all the oil that flows throughout the engine.

There are also other common mistakes to avoid when getting an oil change: getting the wrong engine oil, forgetting to replace the rubber gasket, and forgetting to put the cap back on.

Getting Your Hands on Engine Oil For Your Vehicle

If you’re in the market for engine oil, you can find exactly what you need with just a few clicks when you shop at CarParts.com.

Every item in our catalog is carefully selected by a team of professionals to guarantee quality. You won’t have to worry about your engine oil causing problems and other complications across the years.

Our products are also sold at competitive prices. You won’t have to break the bank to get your hands on what you want. On top of that, our warehouses have been strategically built all over the US, meaning customers can get what they order within a matter of days. This means you can save both time and money.

The best part? You don’t even have to take one step outside your door to get your hands on some engine oil. Simply fill out our vehicle selector and use the search filter to view engine oils for your ride that match your preferred brand and price.

Don’t hold off on ordering new engine oil for your ride. Browse our collection of high-quality products now at CarParts.com.

Reviewed By Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Written By CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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CarParts.com Research Team and Richard McCuistian, ASE Certified Master Automobile Technician