Description
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The 505 CRO Oil System Treatment (12 FL OZ) is an automotive product designed to improve the performance and longevity of your vehicle’s engine by enhancing its oil system. This treatment typically works to: Clean and Protect: Helps remove sludge, varnish, and other deposits that can accumulate in the oil system, keeping it clean. Lubrication Improvement: Enhances the oil’s ability to lubricate moving parts, reducing friction and wear. Performance Optimization: Improves overall engine performance by ensuring smoother operation. Compatibility: Usually safe for use with various types of engine oils and vehicles, though specifics should be checked on the product label. How to Use: Read the Label: Always follow the manufacturer’s instructions provided on the product. Warm Up the Engine: Run the engine to bring it to normal operating temperature. Add Treatment: Pour the treatment directly into the oil system, either during an oil change or as specified by the product. Drive Normally: Let the product circulate through the engine to clean and enhance the system.
James –
I did an oil change and added a bottle of this stuff. It has a really strong solvent smell. I ran my truck at a high idle for 20 minutes, then changed the oil and filter again. After the second oil change, the oil was so clean I couldn’t even see it on the dipstick. I immediately noticed my truck running much smoother as well. My truck has a little over 200,000 miles on it, and the results of using this product were noticeable right away. I also added a bottle of the fuel treatment to my next fill up, but haven’t really noticed any difference as a result of that.
Doug W –
I drive a 2007 Cadi STS, and it’s pushing 200,000 miles. I needed to flush the motor and my mechanic recommended this product. I put it In the oil and ran the motor at a fairly high rpm for 10 minutes. When I opened the drain plug, the sludge, dirt and soot came barreling out. So much so I decided to drop the oil pan and clean it even more thoroughly. I have never used a product that cleaned out so much gook from a car. Very impressed and will definitely use it again when the time comes. My car hums like a bee, and it’s was a sincere value for what I paid. It’s proved to increase my motor’s functionality and quality.
Chase Gitchell –
Added CRO Ran the vehicle in park for 15 minutes at 2 thousand rpm shout out to Scotty Kilmer YouTube Video Amazing cleaner I have freed up stuck piston rings with this 505 CRO Bernie’s cleaner on a vehicle with 287,xxx miles, w/ no oil leaks. I was adding oil every 2 days and now after the 505 i have added oil 2 twice in 3 months of daily driving very impressive, the vehicle gets 39 MPG freeway. Also great and fast communication by the seller making it a worry free purchase
canyonburst –
My 2012 Camry hybrid was starting to burn a little oil between oil changes – about a quart every 7000 miles. Not leaking (no oil on driveway), but burning internally. I followed the directions exactly as stated and it fixed the problem. A miracle.After the application, I drove from SC to AZ and back and did not lose a drop, and none sinse. That has been over 6 months and ~7000 miles.It is expensive and may be hard to justify if your car does not have any issues, but I will be using it every other oil change for the life of the Camry which just hit 200,000 miles.
tom driscoll –
I was burning a quart of oil a month in my Toyota and I drive about 8000 mi a year and the car has 60000 miles on it . So, the first thing I noticed after using the product was that the car responded much better when I pressed on the gas pedal. The car is much quicker and it’s been a month and hasn’t lost any performance. Also I have cut my oil loss 50 percent. So , I will try it again in a few months . I didn’t expect much and was very surprised with the results.
Kenmeister –
This stuff definitely quieted the engine and ticking sound in my aging F-150. I’m sure it was pretty gunked up at 140,000 mi and this stuff seems to have cleaned it out rather well.
Bradley V. –
I have a 2016 Jeep Cherokee with 330,000 miles. After amazing results using ATF Chemical 505 CRF Fuel System Treatment (see separate review), I ordered this ATF Chemical 505 CRO Oil System Treatment. I believe my results are of particular interest because I did not perform the treatment by adding the product to dirty old oil, as you would right before an oil change, but I added the product to fresh clean oil right after an oil and filter change. Wait till you see what happened. The instructions say to add the product to your engine’s oil, run the engine at “high idle” (some mechanics say @ 2,000 RPM) for 10 minutes or more, then drain the treated oil, remove the oil filter and install a new filter and new oil. However, what I did was last night I added the product to the fresh oil that was in my car, ran the engine at regular idle speed (say 750 RPM) for 10 minutes, turned off the engine and let it sit overnight. This morning I started the engine and moderately drove the car (2,000 RPM max) for 40 minutes, parked the car and let it sit for a few hours, then drained the oil. I was very curious to see what the oil looked like when I drained it. Would it look like the brand new oil that I had just put in the car? The answer is an emphatic NO – the oil was PITCH BLACK – it looked like old oil coming from an engine that was overdue for an oil change. In my opinion this stuff does what it was designed to do. It cleaned out the built-up carbon deposits internal of my engine. After installing a new filter and new oil I drove the car today as normal for about 90 minutes around town and highway. It is probably too soon to tell but I think the engine runs smoother and quieter. I will now be using these products on all my vehicles (5 cars/trucks, 4 motorcycles) and recommending this product to everyone. I am SO glad I found out about these products from a mechanic on YouTube who says these are “products your mechanic does not want you to know about” and that they will “make your vehicle last 3x longer”. I have no doubt this is so. Easy to use. Does as advertised. Worth every penny.
cj –
This stuff is LEGIT. Not too happy about the price, but you get hat you pay for. I was starting to think these things were mostly gimmicks, but THIS BRAND HERE is LEGIT! I can definitely “feel” a performance difference. It’s hard to explain, but putting a bottle of this in my ‘95 ZJ helped for sure. I’m going to buy another soon to use on my next oil change.