Well if you consider the Extended Performance grade, at $29.00 for five quarts and an extended life filter, It's $62.00 with tax for the daily limit. (2 5 quart / filter deals per day - limit per customer).
When you figure the extended is good for 15,000 miles before you change either the oil or the extended-life micron-filter, (may be better to swap the filter half way under boost); that's five times the life-span over regular 3000 mile oil. That's 2-3 years of oil changes for an average of 10-15,000 miles a year, for a daily driver, and probably four years of racing, unless you break the cases or blow head gasket, in a fair-weather street-car, or weekend racer. (obviously not a daily driver).
I'll be straining it through cheese-cloth, if I have to to beat old Mobile out of a price increase. Unless I'm confused with my commodities percentages, compared to the fair market price increases, (if you can call them that), by next summer quality engine oil might be $9.00-$11.00 a quart!
The better deal is the Mobile 1 Extended Life, so long as you don't dump it like "mouse-milk" all over the pavement at night, through your rear main seal. (oil additives industry term for consumers who dump it through the seals, on the dirt).
I read Mobile and other premium brands are reformulating the standard brands and adding sales-flash to the bottles, in order to confuse the fact they are lowering the quality, to stay competitive. Who would print such news on the bottle and actually sell anything, right?
Might be time to stock up for a few years supply, since it's not likely ever to be this low, once they re-price the cost increases. We are just starting to see the beginning of it, at the pump. The cost of energy will most likely not decrease for the rest of our life-times, unless you hit oil digging for drinking water in your back yard, like old Jed Clampit.
NJ AutoZone's aren't offering the gallons for $9.99 and had zero Royal Purple anything, except the gear oil. It was $17.00 a bottle.