Royal purple HPS 5w30 for Ford 7.3 gas

[burbguy82]

My version of extended would be 10k or shortly before, which is my OLM. I just recently switched to Schaeffers and hpl which I’ll run the full length. Local shop had cases of 5-20 for $60 just to get rid of it. Seems like a good price compared to Amazon selling 6qts for that price.

Longer intervals really more depend on the engine and conditions rather than the oil.

Royal Purple get a bad name around here,not sure why and people just dont seem to understand the difference between the API stuff and HPS.

I would put HPS up against any oil on the market.