Q: Is it true that once you use synthetic motor oil, you can't go back to conventional or blend?

asked by on September 30, 2016

Is it true that once you use synthetic motor oil, you can't go back to conventional or blend?

Change Oil and Filter $103.58 - $181.08 Get a Quote

Hi there, thanks for writing in. This is one of the biggest myths that exist when it comes to motor oils. You can most certainly switch back and forth at anytime. Synthetic oils are in fact simply a blend of synthetic and other conventional oils. It is recommended, however, that you use the same oils to top off when needed to ensure the best protection for the oils you have chosen to use. When it’s time for an oil change, consider having an expert automotive technician from YourMechanic come to your home or office to perform the service for you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I use the ignition?
Using the ignition is very simple: insert the key, and rotate clockwise. There are four levels on the ignition: 1. Lock. This is the starting position, where you can insert or remove the key anytime you use the ignition. 2....
Doors not responding to key fob
Hello. GM has a very lengthy technical service bulletin about this concern. The reference # is PIE0059, release date 03-19-10. They had an engineer look into the issue and it seems to me they had some low quality door latches....
Wondering if repairs are likely in the near future
Hi there. Most cars are reliable under 100,000 miles. Among the range of cars on the market, Audi is about mid pack in regards to reliability at best. Most Audi's are VW's. In the case of your TT, the 2.0l...
outside temperature thermometer way off, a/c not working, check engine light is on
Hello. The reading of minus 40 degrees does indicate that there is an open circuit in the sensor circuit. This will cause the A/C not to work and the Check Engine Light to come on. The sensor is in the...
I have a 74 distributor with 3 wires can it go on my 79
Hello, thank you for asking about your 1974 Pontiac Ventura. From what you describe it appears to me that you are attempting to convert a points ignition system to an electronic HEI ignition system. This is a very common conversion...
My Dodge Neon is misfiring on cylinder #4. The Check Engine Light is on, code is P0304.
A misfire can can also be caused by a vacuum leak, a wiring problem, a faulty fuel injector (https://www.yourmechanic.com/services/fuel-injector-replacement), a bad electrical connector, or any number of other causes. It would be best to pull the codes that are causing...
2008 Cadillac STS rear bearing ,how do I get the 3 bolts off the bearing the CV shaft is in the way I pushed it in as far as it ca
On this vehicle the upper control arm to knuckle retaining nut must be removed. Using SST (special service tool) J 43631 (or equivalent) the upper control arm is separated from the knuckle. After the hub/bearing assembly bolts are removed, typically...
Check engine light and trouble starting.
Hi there. The P0172 trouble code (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) indicates that there is too much gasoline being detected in the exhaust gases exiting the combustion chamber. The ECU uses a number of instruments, such as the mass air flow sensor (MAF), oxygen...
My 2013 Chevy sonic makes a knockin/clicking noise when I'm coming to a stop or when I slightly turn and idk what it is everyone e
You mention "steam" and interest in installing a new cooling system thermostat but it is not clear from your description if the car is overheating. If the car is overheating, yo can request an engine overheating diagnostic (https://www.yourmechanic.com/services/car-is-overheating-inspection) and the...

Related articles

A Buyer’s Guide to the 2012 Chevrolet Volt
Whether Whether you’re concerned about the environment or just want a vehicle that allows you to use less gas, the 2012 Chevrolet Volt might be just right for you. Designed to run entirely via an electric current, this electric hybrid...
2012 Chevrolet Malibu vs. 2012 Ford Fusion: Which One Should I Buy?
When you want a midsize sedan, you’re looking for something that will offer you the best fuel economy for the size as well as additional safety features that will keep your family safe while you’re driving across town or around...
Understanding Chevrolet Oil-Life Monitor (OLM) System and Lights
Car symbols, or dashboard lights, are a car service reminder. The Chevrolet Oil Light Monitor system indicates when and what service your car needs.