Average Reviews:
(More customer reviews)You may wish to read this before purchasing this product.
Note that no oil treatment is recommended by any auto maker or automotive oil company.
Consumer Reports Article Excerpt
The surprising truth about motor oils
July 1996, pp 10-13.
Purveyors of motor-oil and engine "treatments" assert that their products offer engine protection that oil alone can't provide. In our most ambitious test project ever, we set out to discover whether such claims are fact or fancy.
One way to gauge the performance of motor oils is to test them on the road. We did just that, using a fleet of 75 New York City taxicabs. Indeed, the oil industry itself tests its oils in New York City taxis.
For 22 months, we tested the performance of 20 popular motor oils.We also tested Slick 50 Engine Treatment and STP Engine and Oil Treatments. ...
Testing Slick 50 and STP
We also tested Slick 50 and STP Engine Treatments and STP Oil Treatment, each in three cabs. All three boast that they reduce engine friction and wear.
The engine treatments are added with the oil (we used Pennzoil 10W-30). They claim they bond to engine parts and provide protection for 25,000 miles or more. We used each according to instructions.
The STP Oil Treatment is supposed to be added with each oil change.
When we disassembled the engines and checked for wear and deposits, we found no discernible benefits from any of these products.
The bottom line. We see little reason why anyone using one of today's high-quality motor oils would need these engine/oil treatments. One notable effect of STP Oil Treatment was an increase in oil viscosity; it made our 10W-30 oil act more like a 15W-40, a grade not often recommended. In very cold weather, that might pose a risk of engine damage.----------------------------------------
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Product Description:
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Use every oil change. High viscosity formula is specially formulated to help fight metal to metal friction by providing a thicker cushion between moving engine parts. Excellent for all cars, light trucks and SUVs. STP Oil Treatment fights friction to help protect against engine wear, reduce oil consumption and protect engine parts.
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