K-Mart ; Pennzoil conventional and Platinum on sale
The Platinum is $4.60 a quart or $23.99 for a 5 quart jug . There's a $10 mail-in-rebate from PENNZOIL when purchasing 5 quarts or more of the synthetic . Thus , well under $3 a quart for the synthetic . Go here for details , http://www.pennzoil.com/promotions/#&panel1-5 . You may be able to get Wal-Mart to match K-Mart . Especially if a specific weight is wanted and not available or in stock at K-Mart . Such as 0w-20 .