Skip the auto shop - Our mechanics make house calls

Q: Conventional oil vs. synthetic oil?

asked by on

I have a 99 silverado 1500 4.8l with 85000 miles, can I switch or is it safe to switch to synthetic oil at this point?

Hello. It is safe to switch over to synthetic oil if that is what you wish to do. It is just not a good idea to switch back and forth from synthetic to conventional oil as this can cause leaks and other problems with your oil pressure. If you want to use full synthetic oil you must use full synthetic oil for the remainder of the vehicle’s life or at least for as long of a time as you used the conventional oil. It is also not a good idea to switch to synthetic oil if you are currently leaking oil as this could accelerate the leak. If you’re having any oil leaks, I would recommend enlisting the assistance of a qualified professional to have the car repaired. A technician from YourMechanic can change your car’s oil at the convenience of your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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!

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: I changed the fuel pump and truck ran great for 3 days. Now after 3 days, the truck dies. It will start running for a few minutes, then dies like before.

Hi there, thanks for writing in. I'd be happy to help. It sounds like you should disconnect the connector to the fuel pump and inspect it for any signs of getting hot. The female connections may be too loose on...

Q: Exhaust manifold bright red when car is on

Hi there. An exhaust manifold that reaches high temperatures is a sign of a blockage in your exhaust system. This blockage stops excess emissions to be burned off. The excess fuel and carbon will build up causing your manifold to...

Q: whats the best gear lube i can get for my car and dose it really matter what i get

Synthetic gear oil is recommended. At the cited "link" be sure to click on the "transmission gear oil section" at the top of the page. In terms of your question "does it matter", you will see a material difference in...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...