The answer is no. I dated a girl for a number of years who's father sells oil. He could never beat the WalMart price or auto parts stores when on sale.
For example, the last time I checked a 55 gallon drum of Rotella 15W40 was priced at about $675 or about $12.30 per gallon. I can buy it any day of the week for around $12 per gallon. I just bought 5 6 gallon cases of Valvoline Blue 15W40 for $8 per gallon at the Farm and Fleet store. Its not worth the hassle, you are just paying for convenience of having it delivered but then you have to pump it. To me its hard to beat 1 gallon jugs.
By the way I take care of about 75 engines. Most boats but some trucks, tractors, dozers, dump trucks, generators, ect. I use a lot of oil also doing about 125 oil changes a year. I do buy my filters online in bulk and average about $1.25 for oil filters and $6 for air filters, fuel filters, and hydraulic filters.
Chris