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I would seriously like to see some examples of that (that's not a dig, I'm genuinely curious). I know plenty of guys in the SBF world that ran (and run) M1 5w-50 and the 15w-50 with great tear-down results. These are typically boosted windsors.
Just Google Mobil 15w-50 and "shear". It's well known to turn into a 40 weight, and then a 30 weight, rather quickly.
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So this is recent? Can you elaborate further. You are saying that the 15w-50 product CHANGED?
Not all that recent. 15/50 red cap disappeared, and then the world ended up with silver cap 15/50, which is a nice shear monster.
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That's actually a neat comparison because AMSOIL and Royal Purple both market great filters, but these filters are actually assembled by the majors. These majors are also now making these same type of filters sold under their own names like the FRAM Ultra, the Purolator Synthetic and the WIX synthetic.
In this case, since the FRAM Ultra is cheaper than the EaO, they both use glass media (but different types) but one is a major brand and the other one is boutique, how do we determine which one is "superior"?
Superior: The better performer, with more redeeming qualities.
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It isn't missing the fact, it is simply a relatively small target market. A great number of classic guys and folks that restore classic engines simply recommend an HDEO like Delvac, Rotella, Dello....etc. These engines generally do not place a demand on a lubricant that requires a race oil, particularly when we are talking about stock rebuilds and car show cars.
Which all sounds good, until you figure out that HDEO's are not as appropriate or resilient as a racing style oil. They're not bad, but again, a racing style PCMO is better, because it was designed for the job.
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When I think of the term "superior" I think "better than". That denotes something it can be directly compared to, so in this case a 20w-50 to a 20w-50. If there is not a comparable product, that term loses its significance. I would say (and already have) that "more appropriate" or "niche geared" product would be more suitable terms.
While the majors certainly recommend products for these niches, they are not products designed specifically for them. Neither Shell or Mobil makes a product that directly competes with Dominator for example.
Mobil claims they do, right on their racing page, where they recommend their 15/50 for road and racing activities. This oil exists for no other reason than the niche category, by their own description.
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Sure, but your applications may not be overly relevant (and don't sound like they are) to the OP's little British mill wink
Applications? Not exactly. But when it comes to the 20/50 that he's looking for, Schaeffer's is still on top of the big labels. That is the part that applies directly his his application.
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A more appropriate product (yes, I'm going to keep going on that, LOL!) for your application. And I agree that the often half-arsed recommendation approach when there isn't a purpose-made product leaves a person with much better options, which sounds like is the case for you and your applications with Schaeffers.
Again, and his to. Schaeffer's makes a better 20/50 for his engine than the big labels.
