Q: What's the difference between fully synthetic and semi synthetic oils

asked by on

Would like to know the difference and why I would choose one over the other? Thanks in advance

My car has 20000 miles.
My car has a manual transmission.

The type of oil that should be used is a very heavily debated topic that depends a lot on where you live (climate), driving style, and the car. Synthetic oils are engineered for very high stress performance/luxury vehicles that require the best lubrication under very harsh conditions. Semi-synthetic oils have a combination of synthetic oil and mineral based oil in them. If you are a normal everyday driver that does not drive in extreme conditions and typically drive in fairly normal weather climate, I would say you probably do not need to spend the extra money for a fully synthetic oil based upon the type of car you are driving currently. If you would like to have an oil change done for you, a certified technician can perform this service at your home or office using the correct oil.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. What's the difference between fully synthetic and semi synthetic oils

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: Check engine and oil light on

If your vehicle's check engine light illuminates, there is a malfunction that should be diagnosed and repaired. If you request a check engine light diagnostic, a certified mechanic from YourMechanic would use a code scanner to retrieve diagnostic trouble code(s)...

Q: What should I pay just getting pads done on a 00 toyota avalon

Hi Christopher. If you'd like to receive an estimate to have the pads replaced on your Toyota Avalon, please click this link. If you just want to know an average price to pay at a repair shop, it depends on...

Q: Is there any relation between the sparks plugs not changed and affecting the valve cover

Hello. The spark plugs should not have any direct relationship to the valve covers. If there is a leak going on in the valve covers then the leaking oil can affect the spark plugs and cause a misfire, but as...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.