this is hard core knurd stuff. super lengthy and ultra informative. Too bad he didn't test Motul X-cess
Or any high end oils at all....
I spent way to much time reading that blog many months ago, Personally I think he is full of shit. He claims no affiliations whatsoever yet spends an entire section on Prolong engine treatment and how its "The real deal"
I agree to some extent. His tests are very limited in scope and he seems pretty closed minded. He rants about how he's so perfect in his engineering. Kind of annoying when you consider he's literally only testing one property of the oil...
His main driving point seems to be to dispel the myth that higher levels of zinc additive in oil, or more additives in general, make an oil "better." He tested all the wrong properties of the oil if that was the thesis, lol (he should've tested for anti-friction properties). His own findings are that zinc additives do nothing for shear properties and even degrade film-strength (uhh no shit?). However, calcium based additives did indeed increase shear protection, per his testing methodology.
The industry is now moving towards titanium as the next big thing in oil additives so it's a moot point either way... Pennzoil ultra and Castrol edge now contain high levels of titanium and low levels of other additives. My latest blackstone oil report confirms this.
So yeah, it looks like he is right in that oil manufacturers might've been doing more harm then good by jacking up additive contents in their oils to win advertising wars with numbers. My own personal theory is that a lot of oil manufacturers might've moved to cheaper base stocks and then tried to compensate by throwing more additives into the oil. Works fine for street cars, but performance cars rely on much more than the oils anti-friction properties...
The data is VERY meaningful though. All oils pretty much do the same thing and provide the same amount of lubrication/anti-friction... oil is oil, basically. The issue of premature engine wear/failure in motorsports comes back to what was actually tested... When does the oil break down and begin to fail to provide lubrication? The only property of oil that really matters is: how well does it maintain a film between moving parts?
The data proves certain oils perform significantly better at maintaining shear resistance and film strength under the kind of loads seen during performance driving. I want to run the oil that will maintain it's properties at temps up to and above 300f. This is especially important when running an N54/N55 that hits 300f oil on the regular at the track. A lot of the specialty synthetic oils performed WORSE than even conventional oils in this regard. The test data shows the top 10 oils maintain within 12% of their advertised weight at temps up to 325f whereas other oils fall off tremendously and are even beginning to break down as early as 260f...
He did test a few expensive "race" and motorsports oils. They all came out sub-par compared to the name brand shelf oils like pennzoil ultra, mobile-1, and Castrol edge.
Bottom line is the big brand name shelf products have massively more r&d in their oils than someone like royalpurple ever will and it shows... especially when you're charged with producing world class motorsports oils for people like nascar. That r&d trickles down to their shelf products.
I'll stick to whatever name brand synthetic is on sale at the local auto part store. They all performed within the top 10 and beat out a lot of the more expensive specialty oils by a wide margin.
Most of what you said is correct, Pretty much all of the brand name full synthetic oils are more than whats needed for 99% of cars on the road.
He ignored pretty much all of the top quality oils. He tested the motul 300v ester core motorcycle oil which ended up almost at the top and the only high performance redline oil he tested was straight 30W from 2011. He completely failed to do high temp wear testing on either of these which is what they are designed for.
All of the name brand oils he tested that fell into to the top spots experienced significant drops in protection when exposed to his high temp 275* test.
Also every oil he tested started volatizing at 300* or less
Bottom line if you want the best oil it needs to be a pao or ester core. I spend the extra money on it because I run my stock turbos a 26psi and they are seeing more extreme conditions than any part inside the motor. 1 full season of autocrossing, 1/4 mile passes and just general abuse and they are still perfect.
If my car was just a mildy tuned DD then I would be running the mobil 1 0w40 or 5-30 that i use for everything else.
All of that being said his top 2 oils include prolong engine treatment which is a great way to destroy a motor.