Sinopec oil ?

[Firewoodjoe]

Yep. Just bought another one. Almost $1600. 

[treemuncher]

I don't know where you guys buy the Sinospec oil
But around here it's more money than other brands

I order from RedDrums.com or from Ebay, where ever I find the best price. I normally try to order 4 drums on a pallet to get free shipping.
What was $300/barrel is now $450/barrel. Thanks to the idiot that shut down our nation's access to our petroleum resourses. 

[YellowHammer]

A couple things to consider:  The last 90% of machine wear comes from the last 10% of throttle, operating temperature or usable range (shear), and the API specs are absolute minimum criteria that an oil must pass on a series of fairly limited tests.  

The better "name brand" oils and fluids far exceed the spec, and although generally use the same base stock, have been tailored to make them more stable and have reduced wear in that last 10% of operating range, as well as other things, like moisture absorption (corrosion protection) and usable life.  The general reason most of the name brand fluids cost more is to pay for their name of course, but also because the complex additive packages they specify are also expensive and tailored for their very specific machine use.  Some additives make a huge difference in wear, material compatibility (seals and O rings) and these cost money.  Some lower cost oils really up their detergent packages (makes them very slick but cost less, soap is slippery) but detergents break down at lower temperatures.      

As a military research project, we bought every domestic type of synthetic and conventional motor oil, hydraulic fluid and transmission fluid available from every OTC store in the US including Wal Mart, Auto Zone, Oreilleys, web stores, dealership, etc we could and tested them all against API and Mil specs and graded them.  

The general takeaways were:
There is a major difference under high load, high temp conditions, (>90% throttle, load, operating temp) but for the most part, all performed reasonably well at moderate and low load conditions.  Oil is oil, until it is starts to break down, then it's not oil anymore.

The cheaper oils broke down faster but that could be alleviated by more frequent fluid changes and not running them as hard.

Newer machines benefitted most from high quality oils and fluids merely for the reason they weren't worn out and could actually operate within the upper 10% range.  More worn out systems benefitted less from premium oils because they couldn't reach their operating specs as readily.  Not just max throttle but able to reach max temperatures and cycle times.  

The rate of wear from "tight and new" to "loose and used" was the use of premium fluids.  This is what drives the specifications on machines such as MTBO (Mean Time Between Overhauls).  

We had some pretty spectacular results, multiple systems running at the same time, cheap generic fluids against premium fluids and at moderate operating conditions, there wasn't a dime's worth of difference in their real time performance.  Then when we wanted something to "happen", we drove the mechanism to 100% load, temp and pressure and the premium fluids would keep working and the low cost fluids would "crunch" the machine sometimes within minutes.  

Anyway, I haven't used or tested Sinospec, it may be very good, but the way to find out is to do a literature search and find the actual API test results and see how it scored.    

[treemuncher]

A couple things to consider:  The last 90% of machine wear comes from the last 10% of throttle, operating temperature or usable range (shear), and the API specs are absolute minimum criteria that an oil must pass on a series of fairly limited tests.  

The better "name brand" oils and fluids far exceed the spec, and although generally use the same base stock, have been tailored to make them more stable and have reduced wear in that last 10% of operating range, as well as other things, like moisture absorption (corrosion protection) and usable life.  The general reason most of the name brand fluids cost more is to pay for their name of course, but also because the complex additive packages they specify are also expensive and tailored for their very specific machine use.  Some additives make a huge difference in wear, material compatibility (seals and O rings) and these cost money.  Some lower cost oils really up their detergent packages (makes them very slick but cost less, soap is slippery) but detergents break down at lower temperatures.      

As a military research project, we bought every domestic type of synthetic and conventional motor oil, hydraulic fluid and transmission fluid available from every OTC store in the US including Wal Mart, Auto Zone, Oreilleys, web stores, dealership, etc we could and tested them all against API and Mil specs and graded them.  

The general takeaways were:
There is a major difference under high load, high temp conditions, (>90% throttle, load, operating temp) but for the most part, all performed reasonably well at moderate and low load conditions.  Oil is oil, until it is starts to break down, then it's not oil anymore.

The cheaper oils broke down faster but that could be alleviated by more frequent fluid changes and not running them as hard.

Newer machines benefitted most from high quality oils and fluids merely for the reason they weren't worn out and could actually operate within the upper 10% range.  More worn out systems benefitted less from premium oils because they couldn't reach their operating specs as readily.  Not just max throttle but able to reach max temperatures and cycle times.  

The rate of wear from "tight and new" to "loose and used" was the use of premium fluids.  This is what drives the specifications on machines such as MTBO (Mean Time Between Overhauls).  

We had some pretty spectacular results, multiple systems running at the same time, cheap generic fluids against premium fluids and at moderate operating conditions, there wasn't a dime's worth of difference in their real time performance.  Then when we wanted something to "happen", we drove the mechanism to 100% load, temp and pressure and the premium fluids would keep working and the low cost fluids would "crunch" the machine sometimes within minutes.  

Anyway, I haven't used or tested Sinospec, it may be very good, but the way to find out is to do a literature search and find the actual API test results and see how it scored.    

No doubt that I would be really interested to see how well the Sinopec would stand up to other brands if that data becomes available. I've trashed several other hydraulic systems on other machines with different brands of oils prior to trying Sinopec.
With my main machine these days, I've normally got my engine rating running at 100% for much of the day according to the computer display. My hydraulics spike to 6,500-6,700 psi relief throught the day and most of the time run 2,500-4,500 psi in basic operations that are not heavily loaded. I don't baby it when it comes to feed rate. It's a consistantly working machine. Lots of care with the filtration cart when it comes home to the shop. So far, so good.