Symptoms
- Oil was changed but you're not sure the filter was swapped
- Oil turns dark again very quickly after a change
- Shop receipt doesn't list a filter
- DIY change where you forgot to grab a new filter
Likely causes
- CommonFilter skipped to save time or costSome quick-change habits or rushed jobs skip the filter, especially if one wasn't on hand.
- PossibleWrong filter size stockedIf the correct filter wasn't available, the old one may have been left in place.
- CommonDIY oversightEasy to forget when doing your own oil change without a checklist.
What to do
- Check your receipt or your own memory for whether a filter was listed or purchased.
- If you're unsure, it's simplest and cheap to just replace the filter now rather than guess.
- Drain the old oil, remove the old filter with a filter wrench, and let any trapped oil drain out.
- Lightly oil the new filter's gasket with fresh oil before installing it to get a proper seal.
- Hand-tighten the new filter until snug plus a quarter turn; do not overtighten.
- Refill with fresh oil to the correct level and check for leaks around the filter after a short drive.
Tools and parts
- Oil filter wrench
- Drain pan
Oil filter for your vehicleSearch: “oil filter for [your car year make model]”
When to call a pro
If oil looks dirty again within a few hundred miles of a supposed change, ask the shop to verify or have another shop check.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.