How to Buy Motor Oil at Costco for DIY Oil Changes

Costco no longer provides in-house oil change services in the U.S. through its Tire Centers.which is confirmed on the Costco Auto Program. Instead, the warehouse club has become a popular destination for DIY oil changers who want affordable, bulk-pack motor oil and filters. If you’re a Costco member, you can save money and still maintain your car at home by buying the right supplies in-store or online.

Step 1: Know What Costco Sells

Costco doesn’t change your oil, but it sells Kirkland Signature full synthetic motor oil and other premium brands. Kirkland Signature oil meets all API motor oil standards

• Kirkland Signature Synthetic 5W-30, 5W-20, and 0W-20 are available in 2-packs of 5-quart bottles.

• Average cost: around $25–30 for 10 quarts (vs. $45–60 at other retailers).

• Costco also stocks Mobil 1, Castrol, and Valvoline in some regions.

This makes Costco one of the most cost-effective places to buy oil in bulk.

Step 2: Pick the Right Oil for Your Vehicle

Before you buy, check:

• Owner’s manual for the recommended viscosity (e.g., 5W-20, 0W-20).

• Synthetic vs conventional: most modern cars require full synthetic.

• Warranty requirements: Some manufacturers specify certain brands (e.g., BMW recommends Castrol or Mobil 1).

If you’re unsure, Costco’s website and in-store displays often list compatible makes and models.

Step 3: Buy Supporting Supplies

Costco also carries other DIY oil change items:

• Oil filters (Fram, Mobil, Kirkland in some stores).

• Funnels and drain pans (seasonal, or available online).

• Gloves and shop towels in bulk packs.

If Costco doesn’t have your exact filter, you can pair their oil with filters from AutoZone or Amazon.

Step 4: DIY Oil Change at Home

Once you’ve purchased your oil, here’s a simplified process:

1. Warm up your car slightly, then shut it off.

2. Place a drain pan under the oil pan, remove the drain plug, and let oil flow out.

3. Replace the oil filter.

4. Add new oil using a funnel, check dipstick levels.

5. Safely dispose of old oil at Costco Tire Centers or local recycling points (many Costco locations accept waste oil).

Always wear gloves and follow manufacturer torque specs for filters and plugs.

Comparison Table: Costco vs Other Retailers

Costco is unbeatable on bulk pricing, but you’ll need to handle the oil change yourself.

Related Services Costco Offers

While Costco won’t change your oil, you can still use your membership for:

• 15% discount at participating auto repair shops via the Costco Auto Program.

• Free tire rotations, balancing, and flat repairs when you buy tires from Costco.

• Affordable car batteries (Interstate brand) with installation included.

• Discounted Kirkland car supplies like windshield washer fluid and detailing kits.

While Costco no longer performs oil changes, it still makes sense to compare DIY savings with professional services. One of the most popular alternatives is Walmart Auto Care, which offers quick and affordable packages across the U.S. If you’d rather avoid doing the work yourself and prefer a service center, check out our detailed breakdown of Walmart Oil Change Prices

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