Q: Is it okay to add conventional motor oil to synthetic oil in the car already?

asked by on

I have some synthetic oil in the reservoir already but I can't find any in stores to top off. Is it ok to add conventional oil or will this damage the vehicle?

My car has 130000 miles.
My car has an automatic transmission.

Hi there. Mixing oils of conventional and synthetic types will not cause any problems at all as long as you are using the correct weight oils for the engine. Mixing the oil is better than running the engine low on oil. Just remember that you should get the oil and filter changed as if you used regular conventional oil until you have all synthetic oil again.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Is it okay to add conventional motor oil to synthetic oil in the car already?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Autozone says the camshaft timing is "over retarded" and this is causing the engine light to be illuminated.

Try changing the engine oil and filter to a good type of oil and filter. This will help with the VCM system and keep it functioning properly. If the VCM continues to act up and cause the engine oil pressure...

Q: How do I pair a phone with the infotainment system?

The infotainment system can pair up to five different mobile devices through the Bluetooth system. Pairing your phone takes a few steps, but is very easy: 1. Turn on the infotainment system. 2. Press the CONFIG button. 3. Use the...

Q: Steering wheel and front end shaking between 50+ mph

Hi there, thanks for writing in. The multiple warning lights illuminating on the dash is what triggers a red flag for me in your description above. The shaking in the steering wheel at the speeds you described could be tire,...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.