Good morning. I have been following the GM DI engine threads for the past few weeks. We own a Traverse with a 3.6 DI engine. The agreement here is that this engine may be hard on oil. I have received some great advise from many of you seasoned veterans and it is well appreciated. Many have advised to go with an oil that has a low NOACK %. After doing some research, I have chosen Valvoline Synpower. According to Valvoline's website it has a 10% rating (according to Pennzoil's site, PP is over 12%).
However....
I stumbled upon an Amsoil web-page that compares most of the oils discussed in these forums. Are the numbers in these tests accurate?
https://www.amsoil.com/comparison/motor-oil.aspx (Nov 2008 test)
For example. A few of the NOACK numbers are off from the manufacturer's numbers. The test results for Synpower's NOACK % is lower than Valvoline's own website by quite a bit.
Also, seems, according to Amsoil, that Castrol GTX can hang with the synthetic boys on almost every test. In particular the ball bearing test and the NOACK tests. I find it hard to believe that plain ole dino GTX has a lower NOACK Volatility than every "super-market" brand of synthetic oil out there.
If GTX is this good, am I wasting my cash on Synpower?
Castrol does not provide NOACK numbers on its website for any of its oils. I emailed them for the information, but they responded stating, "castrol does not provide the information you requested on proprietary materials used in our product manufacturing. We assure you the products we make are of the highest quality... blah blah blah."
Is Castrol GTX really that stout of a dino oil?
However....
I stumbled upon an Amsoil web-page that compares most of the oils discussed in these forums. Are the numbers in these tests accurate?
https://www.amsoil.com/comparison/motor-oil.aspx (Nov 2008 test)
For example. A few of the NOACK numbers are off from the manufacturer's numbers. The test results for Synpower's NOACK % is lower than Valvoline's own website by quite a bit.
Also, seems, according to Amsoil, that Castrol GTX can hang with the synthetic boys on almost every test. In particular the ball bearing test and the NOACK tests. I find it hard to believe that plain ole dino GTX has a lower NOACK Volatility than every "super-market" brand of synthetic oil out there.
If GTX is this good, am I wasting my cash on Synpower?
Castrol does not provide NOACK numbers on its website for any of its oils. I emailed them for the information, but they responded stating, "castrol does not provide the information you requested on proprietary materials used in our product manufacturing. We assure you the products we make are of the highest quality... blah blah blah."
Is Castrol GTX really that stout of a dino oil?
