Check an oil change quote

What the job usually involves.

An oil change drains the old oil from the oil pan, or on some engines extracts it by suction, replaces the oil filter, refits the drain plug, often with a new gasket, and refills the engine with the grade and amount the manufacturer specifies. Many shops then run the engine, check the plug and filter for leaks, recheck the level and reset the maintenance reminder.

Some engines use a cartridge filter inside a housing whose cap O-ring is usually replaced with it, and some have no dipstick, so the level is read on the dashboard or with a scan tool. The owner's manual sets the oil specification and the change interval, sometimes with a separate schedule for severe driving conditions.

What a complete written quote should state.

• The oil viscosity grade, type and any specification or approval the manual requires.
• The quantity included and the charge for any extra oil.
• The filter used, and the drain plug gasket or cartridge O-ring if replaced.
• Any bundled checks or services, and any extras priced separately.
• Labor, supplies, disposal fees and tax.
• The service reminder reset, and a record of the date, mileage, oil and filter on the invoice.

SourceFederal Trade Commission — Auto Repair Basics ↗ (opens an external site)

What changes the total.

The oil itself matters most: full synthetic, blends and conventional oils differ, and the owner's manual may require an industry service category and, for some engines, the carmaker's own approval shown on the container. Engine capacity decides how much is needed and whether a package limit is exceeded.

The filter, bundled services, disposal fees and the local labor rate account for most of the rest. A low advertised or “starting at” price with a quantity cap or a basic oil is not the same offer as a price for the full fill with the specified oil.

Does it have to be done at the dealer?

According to the FTC, you do not have to use the dealer for maintenance to keep your warranty in effect, and it is illegal for a dealer to deny warranty coverage because routine maintenance was done by someone else. Using aftermarket or recycled parts does not by itself void the warranty either; the manufacturer or dealer must prove such a part caused the damage before denying coverage.

There is an exception: if the warranty provides the work for free, the dealer or manufacturer can require you to use facilities it chooses. Keeping invoices that show the oil and filter used makes it easier to show the schedule was followed.

SourceFederal Trade Commission — Auto Warranties and Auto Service Contracts ↗ (opens an external site)

When a second opinion is worth it.

• The quote does not name the oil grade or specification.
• Extra quarts appear on the bill that the package price did not mention.
• An engine flush, fuel-system cleaning or air or cabin filter is added with no reference to the manufacturer's schedule, or the old filter is not shown.
• The invoice does not record the mileage, oil or filter used.

If the oil pressure warning light comes on while driving, stop the engine as soon as it is safe to do so. Running an engine low on oil can damage it.