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Grado PS-1000 // Preowned Professional Series Headphones / Original BoxThe Grado PS1000 headphones are a bold statement in the world of high end, audiophile grade cans, delivering sound with such precision and detail that theyre almost unapologetic in their mission to extract every micro nuance from your music. These aren't your run of the mill headphones for casual listening. The PS1000 are like the Ferrari of headphonesyou dont buy them to cruise around town; you buy them because you want to push the limits of whats
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 1607 reviews
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Product Reviews
★★★★★ 5
A truly "practical" guide!
Format: Hardcover
Mr. Bernsten wrote this book to share what he has learned both right, wrong and otherwise in his illustrious and decorated career. These kinds of books are not written to make money. They are written for the love of the profession and how to make the entire genre better. The book is "A Practical Guide." It is clear and concise.
I am quite sorry that Mr. Steele feels the way he does. Perhaps there is a tinge of jealousy there.
Mr.Bernsten had a home run with his work "Jaw Breaker" and his most recent "The Walk-In." Crossing over to write "Human Intelligence.." only shows he loved his work and the agency he worked for. What came out of his career is how to make HUMIT, CT and leadership better.
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Reviewed in the United States on December 7, 2008
★★★★★ 5
250K miles on my Corolla and its running like a champ!
Style: Restore & Protect, Size: 5 QT, Configuration: 5W-30
The Valvoline Restore & Protect Full Synthetic 5W-30 has been one of the best motor oils I’ve used in a higher-mileage vehicle. After a few oil changes, the engine felt noticeably smoother and quieter, especially during cold starts. Throttle response improved slightly, and idle became more consistent as well.
What really stands out is the cleaning performance. This oil is designed to help remove deposits and prevent future buildup, and it seems to actually deliver. My engine runs cleaner, and oil consumption appears lower compared to some other synthetic oils I’ve tried. It also holds up very well between oil changes without breaking down or getting excessively dark too quickly.
The 5-quart jug is convenient, easy to pour, and priced competitively for a full synthetic with advanced additives. If you want a high-quality oil that not only protects your engine but also helps restore performance over time, this is an excellent choice. I’ll definitely continue using it for future oil changes.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Great product, value for the money
Style: Restore & Protect, Size: 5 QT, Configuration: 5W-30
Best engine cleaner, for the same price of any premium oil out there, this product cleans and protect at the same time, it may restore performance since cleans piston rings it may improve oil consumption
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Reviewed in the United States on May 31, 2026
★★★★★ 5
It really works. Cleaner, quieter, smoother operation.
Style: Restore & Protect, Size: 5 QT, Configuration: 5W-30
This is the most amazing oil I have ever used. As a previous mechanic and current auto enthusiast, I am very picky about what I use in my vehicle. I tried this on a car I planned on trading in for about a year before getting rid of it and it really made a difference in quieting down the lifters and valve train. Looking internally to the engine I found that this does clean and dissolve varnish internally while also retaining its viscosity. I was impressed by the improvement in how smoothly it made that car run until trading it in. I've been using it in my new to me 20 year old used car I bought which has low mileage and runs great. Using this oil has only made it run better. Quieter, smoother, etc. I have used RP, Mobil 1, Pennzoil, and more. This one is my new number one that I plan on sticking with for the life of my vehicle.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Simply put, it’s a miracle product
Style: Restore & Protect, Size: 5 QT, Configuration: 5W-30
There’s a reason this product won the best consumer product of the year, 40,000 customers voted on this product as the most innovative product of the year for car care. Personally it has stopped my 185,000 mile, 16 year old Subaru EJ253 engine from consuming/burning oil in just 2 3,000 mile interval oil changes. I was previously burning about a quart of oil every 1,000 miles before using the Valvoline restore and protect and it has already done its job and then some. Not only have I stopped consuming oil, I’ve seen roughly a +3mpg increase compared to the times I’ve used and tracked MPG while using Shell Rotella T6 and Pennzoil Ultra Platinum; it doesn’t end there either as I regularly check my engine oil dipstick out of habit because the car used to burn oil and I had to stay on top of the oil level. Upon checking my oil level at 1,000 miles into the second oil change I was shocked to see how clean the Valvoline oil was on the sides of the dipstick, using other oils and checking them at that interval has always had my oil looking quite black and dirty just 1000 miles after a change, this was not the case with the restore and protect; it came out at 1000 miles looking very clean, translucent and not discolored. I can’t recommend this product enough, especially at the price point compared to competitors; I will always have a jug of this stuff in the garage.
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Reviewed in the United States on March 31, 2026
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