Skip the auto shop - Our mechanics make house calls

Q: Opinion on cylinder deactivation

asked by on

What's your opinion on cylinder deactivation?

Cylinder deactivation on those cars, let’s say a V8 engine, sometimes runs on 4 cylinders and sometimes runs on 6 or 8. It determines this through computer activation.

The old systems are absolute garbage. GM had one on Cadillac, and it was a piece of garbage. It fell apart and they run like junk. The new ones are completely different designs. They are all computer controlled and some of them work quite well so you get maximum power with the maximum gas mileage when you are just touring around at a steady speed.

But, they are very complex systems and when they break they cost a small fortune to fix. My advice is, if you want a good gas mileage, get a 4-cylinder car or a diesel. If you want power, get a V8 or the turbo charged car. But, don’t think you are going to get a giant past V8 that’s going to get a really good gas mileage with those type of systems. Because, I guarantee it, they’ll all end up having problems, breaking down when they are older. They are so complicated.

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

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: Coolant leaking into cylinders

Hi. As coolant is burned through the combustion chamber, it travels through the exhaust which can damage your catalytic converter. This will lead to the clogging of your exhaust and can cause different problems with your vehicle. If you need...

Q: Engine misfire cylinder 3

The misfire could very possibly be from low compression. You want the compression across all cylinders to be within 10% of each other at most. The compression for number 3 is under that threshold. It could be caused by worn...

Q: Ignition cylinder won't turn

The most likely cause is the key cylinder failing. In most circumstances, the ignition switch and key cylinder are replaced as a unit as they cannot be separated. A qualified technician, such as one from YourMechanic, will be able to...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...