I haven't heard of it but their website says this. If they meet api and some oem approvals then it can't be a bad oil if used appropriately.
Our National™ oils will meet or exceed the same performance requirements as major brands, so you can compete for market share with confidence. Just like the major brands, we’ve earned official licensing and certifications from governing bodies and OEMs including:
American Petroleum Institute (API)
ILSAC
NMMA
Representative OEMS: Mack® Trucks, Volvo, Detroit Diesel, General Motors dexos® and DEX VI®, Ford MERCON LV®, and Allison Transmission®
Certified ISO 9001:2015 & IATF 16949:2016