Their oils are used for long drain intervals, as you’ve described it, in large fleets. They’ve been holding up well in those long drains. Remember, this is a small company, so the website, advertising, etc. aren’t what you would get from a big company.
If you want details, or want to discuss your specific needs and concerns, they will do that, and you’ll get a reply from a very, very knowledgeable person, often the owner himself.
Contrast that with a big company, like the ones you find on the shelf at Walmart, where your questions get answers by a support representative, not the CEO, and they know far less than the folks with whom you’re speaking at HPL…it’s clear that HPL is simply different than any other manufacturer.
I’ve never seen a manufacturer take the time to talk with customers, open their doors to customers, even blend oils based on customer feedback. The “No VII” line, for example. Honestly, if you want to discuss your application, reach out.
@High Performance Lubricants has been very helpful in helping me select oil for my cars.
I just ordered another case of their 0W30 as I induct another Volvo into the fleet.