While varnish and sludge can build up in a poorly maintained engine, this normally never happens when your oil changes are performed regularly. Even if your engine has been a little neglected for a while, new oil contains detergents that will safely clean your engine over the coming months and years. The vast majority of engines on the road are quite clean inside, and will stay that way as long as their maintenance is kept up.
Almost every vehicle manufacturer has released technical service bulletins or other documentation where they recommend against performing crankcase flushes.
Not only is the service unnecessary, they say, but it can also damage your engine. Additionally, if you have recently purchased a pre-owned vehicle with virtually no record of maintenance, an engine flush followed by an oil change of fresh oil may prevent a costly repair later on.
In contrast, cars that have had recent internal engine repairs would benefit from a flush. As the chemicals will help to clean out any leftover particulates before new oil is added. Last of all, cars that have a long interval between oil changes would benefit from an engine flush.
Any time you perform any sort of maintenance on your vehicle, especially where oil is present, a flush will help to extend the life of the vehicle. Imagine an engine flush as giving your engine a fresh start. This includes but is not limited to getting oil changes on schedule as recommended by your vehicle manufacturer.
Keep your car on the road and avoid costly repairs by performing routine maintenance. Your car and your wallet will thank you! Enter your email address and we'll email you a digital version of this coupon that you can present on your mobile device at your Sun Devil Auto Shop. Skip to content. Find a Location Locations. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. When is an engine flush a good idea? Ask Question. Asked 5 years ago. Active 4 years, 3 months ago.
Viewed k times. My mechanic performed an engine flush on my old car and so far, it seems to be ok. Is it safe? Is it necessary? What are the pros and cons of doing it? Improve this question.
Zach Mierzejewski 1, 2 2 gold badges 18 18 silver badges 38 38 bronze badges. Welcome to mechanics. We're glad you're here! I've cleared up your question a bit to make it less opinion based, and thus more on topic.
Feel free to clear up my edits if I didn't communicate your intent correctly. Why do you think that you may need to flush your engine in the first place?
They are always a good idea if you are running a service operation, because they make you more profit. And if you are unscrupulous and running a service operation, most customers won't even know whether or not you did the flush, so long as you put it on the invoice After a leak e. You want to clean that out thoroughly. Otherwise, probably never. Add a comment. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe.
Under the Hood. Engine Performance. Image Gallery: Engines One of the services an oil change technician might suggest is an engine flush, which is exactly what it sounds like -- it flushes the gunk out of your engine.
See more pictures of engines. An engine flush can clear out deposits and open narrow oil passages clogged by gunk that's been floating around in the oil. While an engine flush promises to clean gunk out of your engine, many auto manufacturers advise against performing an engine flush on modern vehicles. Is it a good idea to do an engine flush? There may be a few instances where an engine flush is a good idea, but today engine technology has progressed to the point that many newer vehicles don't need it.
In fact, newer model cars may be harmed by the procedure. Will an engine flush improve gas mileage? An engine flush won't have much impact on your gas mileage, and you likely won't notice a difference. How often should you flush your engine?
Most modern vehicles don't need engine flushes. It's best to practice normal maintenance to keep your engine running smoothly and properly.
Will an engine flush damage engine? In some modern vehicles, an engine flush may cause damage.
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