Husky oil at $15 for 16 ounces translates to $30 a quart. It's made for low pressure shop compressors. Shop compressor oils made for compressors that reach 150 psi not the 4500 psi of Yong Hengs, Tuxings, etc. The problem with them is that they create more sludge and carbon residue that wears out the composite high pressure rings. The carbon residue from heat fouls check valves. On the opposite end of the scale is using $$$ Mobil Rarus which is sold repackaged in small containers by resellers. If you are getting the genuine Rarus it is overkill for an inexpensive compressor. The best way to save on shipping is to buy a gallon of quality brand oil like Secolube since the shipping is the same for a gallon as it is for a quart. You can also try Royal Purple which is sold locally at $20 a quart. Many swear by it but some others don't. I've never trued it so can't comment on it except to say it's affordable and it is made for high pressure compressors.