I bought a 5 gallon pail of SAE 40 for $10 at the Walmart in Hinton, Alberta 5 years ago. The enviro fees and tax added another $7.
Single grade group 1 HDEOs like Delo 400 or Pet-Can Duron have full additive packages with ZDDP levels around 1,300.
They seem to work well for cleaning up old V8s.