10 Best Synthetic Motor Oil of December 2025

• Dramatically reduce engine wear
• Leave critical engine parts 4X smoother* * As tested in the industry Sequence IVA wear test
• Superior wear protection on critical engine parts
• Meets Specifications: API SN Plus, ILSAC GF-5, GM dexos1 Gen 2, Ford WSS-M2C929-A, WSS-M2C946-B1
• Castrol recommends the use of Bosch oil filters

Castrol

• Enhanced anti-wear additives deliver a thick & durable layer of anti-wear film to help prevent auto engine breakdown
• Full synthetic formula for exceptional high and low temperature protection
• Extra detergents help fight sludge and deposits
• Premium seal conditioners help treat and prevent leaks

Valvoline

• Keeps your engine running like new
• Race proven
• Mobil 1 15W-50

Mobil

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
• Excellent overall lubrication and wear protection
• Outperforms our conventional high mileage oils
• Helps protect critical engine parts in higher mileage engines
• Helps reduce the sludge and deposits that conventional oils can leave behind
• Helps prevent leaks

Mobil 1

• Full synthetic 10W-30 engine oil made from made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
• Provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
• Pennzoil Platinum 10W-30 keeps pistons up to 45% cleaner than the toughest industry standard (Based on Sequence IIIH results)
• No other leading synthetic oil provides better wear protection from friction (Based on Sequence IVA wear test using SAE 5W-30)
• Formulated to provide faster low-temperature oil flow and protection in extreme heat
• Helps protect engines from loss of power
• Single 5-quart bottle with ergonomic design for easy handling and pouring
• Pennzoil is the first motor oil made from natural gas, not crude—PurePlus Technology converts pure natural gas into high-quality, full-synthetic base oil that's crystal clear and contains fewer impurities than other traditional and synthetic motor oils
• Formulated for modern turbocharged engines—GF-6, API SP/SP-Resource Conserving and all previous categories

Pennzoil

• Mobil 1 Extended Performance full synthetic motor oil 0W-20 helps to protect your engine from the five factors that can damage engines over time
• Helps to protect critical engine parts for up to 20,000 miles between oil changes*, controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
• Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI), timing chain wear protection while keeping your engine clean and helping your fuel economy
• Helps extend engine life by working to prevent damaging deposits and sludge buildup
• Provides excellent internal engine heat protection (up to 500 degrees F) and low temperatures (to -40 degrees F)

Mobil 1

• Advanced premium full synthetic motor oil to offer strength under extreme pressure
• Titanium strong for maximum engine performance
• Reduces metal-to-metal contact across a range of different driving speeds
• Protects the engine for the entire drain interval even under extreme pressure
• Decreases engine deposit formation to help maximize engine response
• Best full synthetic money can buy
• API SN, ILSAC GF-5, ACEA A1/B1, A5/B5, GM dexos1, Meets Ford WSS-M2C929-A, Ford WSS-M2C946-A, Honda HTO-06, Meets engine test requirements of Chrysler MS-6395
• Castrol EDGE is 3X stronger than Mobil 1 against viscosity breakdown* *Tested in the ASTM D6278 test in the 5W-30 viscosity grade.

Castrol

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
• Formulated for longer drain intervals
• Helps prevent build up that can cause rust and corrosion
• Reduces friction for less engine wear
• High resistance to viscosity and thermal breakdown
• Helps reduce exhaust emissions

Amazon Basics

• Innovative anti-wear additives provide 50% more wear protection than industry standards as tested in the industry Sequence IVA wear test
• Full synthetic formula for exceptional high and low temperature protection
• Extra detergents help fight sludge and deposits
• Superior antioxidants resist motor oil breakdown in extreme conditions

Valvoline

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.

Mobil 1