If you sign up for the preferred account (it’s not much, like $50/year I think) you end up getting some perks like cheaper/faster shipping and you end up getting a crazy amount off of the oils/fluids. An oil change with amsoil oil and filter is only like $10 more than the bargain stuff at Walmart this way. Same with diff fluids and such, their severe gear diff fluid is only like $1-2 a qt more than the cheap stuff with the preferred account. Plus they send you some swag every now and then too