Will Annual Oil Change Damage Your Car? Let's find out!

Does waiting a full year to change motor oil damage your car if it has not yet reached the oil change interval for miles or hours? Do you need to change oil sooner than a year if your car has not yet reached the recommended miles for an oil change? Two engines with oil over one year in the crankcase tested to determine if the oil was still good or if it had become corrosive. Oil tested by Project Farm and by an independent oil testing lab for moisture content, total base number, contamination, acidity, and overall condition. The oil in both engines had not yet reached the oil change interval for miles/hours. Recommend following the manufacturers oil change interval guidelines for miles and length of time for your car.

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➡ Products Tested In This Video (in no particular order):

Videography Equipment:

This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results. Project Farm LLC

[ProjectFarm]

Thanks to everyone who requested this comparison and please let me now what oil brands you'd like tested in future. Thanks again, Todd

[nicolem.]

This guy is planning multiple tests months and years in advance. Most of the people I know can’t plan out a cigarette break. Bravo. Amazing organization!

[TerryClarkAccordioncrazy]

Over a million subscribers and you haven't changed a bit. Your humility and diligence does you credit.

[Magnabee]

This video dispelled a myth that I’ve heard forever and saved me a bunch of time and money. Thanks.

[aromaticpillow]

The most trusted channel on Youtube. This thanks is way overdue. Thanks!

[Layput]

This should be one of the channels that deserve the patreon sponsorship.

[NotMorganFreeman.]

This went far beyond any testing I expected to see from this video. There was so much information that I had to rewatch some segments. Truly impressive channel.

[nephi]

Almost 1 - MILLION Subscribers and he doesn't even beg for them with each video!!!

[jennydiez]

Great test! My dealership was having me change oil every 3k, but new dealership says once a year. Im a recent widow (my husband got 439, 000 out of his 95 Dakota and did all the maintenance and repairs on our vehicles) and have to rely on yt and research. I appreciate your work and attention to detail.

[thehappytexan]

You’ll love this Mr. Todd. I went to pick up an order from the local AMSOIL warehouse the other day and asked them to arrange it in a box so I could ship it. The guy asked “is it a gift for Christmas”? I told him I was sending it to a YouTuber that I send products to just as little gifts now and then. He perked up and said “ is it for project farm!!?” I told him who it was for and that you buy all of your own products to be fair. They all love your oil shootout videos!

[yamahabradley]

You do a great job, factual and demonstrated results with no drama or gossip. Its very refreshing these days.

[superseriousreviews]

Thank you. The unbiased information that you provide is extremely rare. I really appreciate everything you do.

[wakingupfrom]

i'm only on 3 hours of sleep right now. These videos are so important to watch. learning so much. thank you

[shumwab]

This kind of information is hard to find or doesn't even exist in a textbook anywhere. You are literally unlocking the mysteries of the universe.

[electronicsNmore]

Absolutely fantastic testing! Hard to dispute the lab results. That truck is in great shape for its age! I like that oil filter cutting tool.

[SnA]

It's been a year video, but still helps unanswered question for many. Totally respect your effort and time doing this experiment. Hands down the best auto tester channel

[iian]

I have been a member since the near begging of this channel. Love the genuine honestly in all the tests. Great channel.

[rogergeyer]

Good to know that for retired people like me that don't drive much (under 4000 miles a year), that using high quality full synthetic oil, the annual oil change is good enough. Also good to know that if you go 13 months, say, vs. 12 on occasion between oil changes, no big deal with low mileage.

Thanks for the energetic testing efforts you do. Subscribing and thumbs up.

[jamescherney]

I' ve always believed the " once a year regardless of milage" oil change was a way just to sell more oil. I change the oil based on mileage or operating hours on my vehicles and tractors. All have had long lives with no wear problems. So many people are throwing away good oil thinking they are prolonging the life of their vehicles. You proved them wrong. Thanks for the test.

[justlife]

I really like your testing style... no assumptions, no personal years of experience, no nonsense...
Like always no beating around a bush... pure a simple hard core testing....