: Frequently cited as the best place for DIYers. You can find name brands like Mobil 1 and Pennzoil often priced lower than at specialty stores. Their house brand, SuperTech , is a popular budget choice that meets industry certifications. Costco : A top contender for bulk synthetic oil. Their Kirkland Signature

If your goal is the absolute lowest price, big-box stores are usually the winners.

full synthetic often comes in 10-quart packs for around $25 per 5-quart jug, which can even beat Walmart's pricing. 2. The Specialists: Auto Parts Stores