API SP/GF-6 Royal Purple 5W-30 test results from PQIA

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13,837
Location
Kendall, FL


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6,956
Location
Roanoke Virginia
I not sure I love RP but I do have two Jugs in the stash that made my price point at $20 a jug from a WM close out last year. Its 10w-30 and I may use it next summer. That place would have to freeze over before I'd pay $35 a Jug for it!
Lol 😂 yeah it is expensive stuff but I like to buy it occasionally because when I was in school they were one of the companies that supported our engine building team as long as we displayed their banner when they done competitions.
 
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6,425
Location
New Braunfels
Looks similar to SuperTech at twice the price.
They all look pretty much the same by these measures. the Simplest explanation is to much deviation from these proportions exceeds limits in some cases and causes performance failures in others. could there be Some oppurtunnity for some ground breaking imaginative formulations? Maybe boring but maybe this is what good specs look like.
 
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