It’s a good idea to check your oil between oil changes and top it off as needed. But this shouldn’t take the place of getting regular oil change service done. If your oil level is low and you top it off, the new oil doesn’t clean the old oil.
The old, dirty oil just mixes with the clean oil and you won’t get nearly the performance from the new oil, putting significantly more stress on your engine. The oil won’t be able to reduce heat, effectively lubricate the components, or absorb dirt and debris.
If your oil level is significantly low, top it off to bring it closer to the proper level temporarily, but make sure to come into your closest Lamb’s Tire & Automotive location for a full oil change service as soon as possible.