Skip the auto shop - Our mechanics make house calls

Q: Lucas oil treatment

asked by on

I know that you use and recommend Lucas oil treatments but I've read lately that it can be bad for engines. I wonder what is your opinion about it.

I use it, yes. But I use it on the older, worn-out engines and it helps build up the compression because it is a thicker oil and I believe it has molybdenum sulfate, which is a very good metal cleaner that clings on to metal. But I wouldn’t use it on a modern new engine that doesn’t have any problems because those modern cars are made for the 0W10 oil, which is super light. You don’t want to use them on a car that uses very light-weight oil.

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: IJust changed the pressure hose for the power steering and I still have a leak.

Check the power steering system to see where the leak is coming from. The leak could be another hose, a fitting that is not tight or loose, the reservoir to the power steering pump could be cracked, or the system...

Q: How do you check the engine oil?

Checking the level of oil in the engine is a critical part of general maintenance and something that you should do regularly (with every fill-up, ideally). Here’s how to do it the right way: Park so the car is...

Q: What does the Engine Oil Pressure Light mean on the dash?

Your car’s engine needs oil – it lubricates, reduces friction and ensures a long life. However, it also needs to maintain the right amount of pressure in the engine. If pressure drops, it means there’s something going wrong. The Engine...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...