What Causes Engine Oil Leaks and How to Prevent Them

What Causes Engine Oil Leaks and How to Prevent Them
An oil leak might start as just a few drops in your driveway—but if left unchecked, it can spiral into costly repairs. At Lee’s Service in Reedley and Fresno, CA, we help drivers understand the root causes of oil leaks and how to prevent them before serious damage occurs.
Common Causes of Engine Oil Leaks
Worn Gaskets and Seals
Gaskets like the valve cover gasket, oil pan gasket, and rear main seal naturally wear down over time due to heat and pressure. When they lose flexibility or crack, they allow oil to seep through.
Damaged Oil Pan
Your oil pan sits underneath the engine—right in harm’s way of debris, speed bumps, and potholes. A dented or cracked oil pan can lead to significant leaks.
Improper Oil Filter or Drain Plug Installation
If the oil filter isn’t properly tightened or the drain plug washer is worn or missing, oil can slowly leak out after an oil change.
Excessive Engine Heat
Engines that overheat frequently can cause seals and gaskets to degrade faster, increasing the chance of leaks.
High Oil Pressure or Wrong Oil Type
Using the wrong type of oil or having excessively high oil pressure can strain seals and cause oil to escape in places it shouldn't.
How to Prevent Engine Oil Leaks
While not all leaks can be avoided forever, here are smart habits to reduce your risk:
- Get regular oil changes with the correct oil type and quantity
- Inspect for signs of leaks between oil changes—look for fresh stains under the vehicle
- Check oil levels monthly to catch slow leaks before they cause low oil pressure
- Have your car inspected if you smell burning oil or see smoke from the engine bay
- Drive carefully over rough terrain to avoid damaging the oil pan
Catch Leaks Early with Professional Help
Prevention is key—but if you already suspect a leak, don’t wait. Catching it early can save you from major engine damage and expensive repairs.
Our ASE-certified techs at Lee’s Service are here to help you stay ahead of engine problems. We offer accurate oil leak diagnosis and repair at both our Reedley and Fresno, CA locations.
→ Learn more about our oil leak repair services here.
Protect Your Engine—Schedule Service Today
If you’re due for an oil change or suspect a leak, now’s the time to act. Book your visit at Lee’s Service and let us help keep your vehicle running clean and leak-free.
Need expert oil leak repair in Reedley or Fresno? Click here to schedule an appointment.
