10 Best Full Synthetic Oils

After analyzing 132 products, scanning 2360 reviews, spending more than 36 hours of research and speaking with our test users, we think the AmazonBasics Full Synthetic Motor Oil is the one of the Best Full Synthetic Oil on the market.

AmazonBasics Full Synthetic Motor Oil – Best Overall Full Synthetic Oil

AmazonBasics Full Synthetic Motor Oil
  • Full-synthetic motor oil (5W-30, 5 quart); formulated for longer drain intervals
  • Formulated to reduce likelihood of Low Speed Pre-Ignition; reduces friction for improved fuel economy and protection against engine wear
  • High resistance to viscosity and thermal breakdown
  • Helps to fight volatility burn-off to minimize engine deposits and exhaust emissions
  • dexos1 Gen 2, API SN Plus, and ILSAC GF-5 approved; always follow vehicle manual recommendations

Castrol 03084 EDGE 5W-30 Advanced Full Synthetic Motor Oil – Best under $50

Castrol 03084 EDGE 5W-30 Advanced Full Synthetic Motor Oil
  • 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.Instructions:Take advantage of the 1 QT bottle for quick oil changes and top-offs
  • 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 recommends the use of Bosch oil filters

Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil – Best Budget Full Synthetic Oil

Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil
  • Dramatically reduce engine wear
  • Leave critical engine parts 4X smoother
  • Add a layer of protection during warm-up and beyond
  • Cling to critical engine parts when the oil drains down
  • API SN; ILSAC GF-5; GM dexos1; Meets Ford WSS-M2C929-A; Meets Ford WSS-M2C946-A; Meets the performance of GM 6094M
  • Castrol recommends the use of Bosch oil filters

Pennzoil Platinum Full Synthetic Motor Oil (SN) 5W-20

Pennzoil Platinum Full Synthetic Motor Oil (SN) 5W-20
  • Engineered to provide a high-quality base oil using our revolutionary PurePlus gas-to-liquid technology in combination with a high performance additive system
  • Helps protect against the effects of low speed pre-ignition (LSPI) in modern turbocharged engines
  • Provides better fuel economy which helps you drive an extra 550 miles per year vs a dirty engine
  • Offers unsurpassed wear protection by keeping engine parts from coming into contact
  • Delivers outstanding piston cleanliness, keeping pistons up to 50% cleaner than required by the toughest industry standards- based on Sequence IIIH engine test results

Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT

Valvoline  Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT
  • Excellent engine cleanliness through superior sludge and varnish protection
  • Outstanding high-temperature protection under severe driving conditions and superior cold-temperature protection through faster oil flow at start-up
  • Helps maintain fuel efficiency
  • Meets the performance requirements of virtually all naturally aspirated, turbocharged and supercharged passenger cars operating in North America
  • For any product use or product technical questions call 1-800-TEAM-VAL

Castrol 03081 EDGE 10W-30 Advanced Full Synthetic Motor Oil

Castrol 03081 EDGE 10W-30 Advanced Full Synthetic Motor Oil
  • 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, GM 4718M, 6094M, Meets engine test requirements of Chrysler MS-6397
  • Castrol recommends the use of Bosch oil filters

Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon – Premium Pick

Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil (1-Gallon
  • Provides 1.5% improved fuel economy performance compared to SAE 15W-40 oils
  • Triple Protection Plus formula combines fully synthetic base oils with advanced additives for excellent equipment protection and long engine life
  • Formulated with additive technology that protects against the effects of soot, dirt and other contaminants
  • Engineered with shear stability to resist viscosity loss and maintain optimal engine oil pressure
  • Suitable for diesel-powered vehicles from tractor/trailers to classic cars and heavy-duty diesel pickups that allow an SAE 5W-40

Castrol 03124 EDGE 0W-20 Advanced Full Synthetic Motor Oil

Castrol 03124 EDGE 0W-20 Advanced Full Synthetic Motor Oil
  • 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, GM dexos1, Meets Ford WSS-M2C947-A, Meets engine test requirements of Chrysler MS-6395
  • Castrol recommends the use of Bosch oil filters

Valvoline Full Synthetic High Mileage with MaxLife Technology SAE 0W-20

Valvoline  Full Synthetic High Mileage with MaxLife  Technology SAE 0W-20
  • Premium, full synthetic base oil for the best protection against engine heat and stress
  • Seal conditioners rejuvenate aging engine seals to help stop and prevent oil leaks
  • Extra wear protection helps prevent future engine wear
  • Extra detergents keep older engines cleaner by bonding with and removing sludge and deposits

Pennzoil Platinum Full Synthetic Motor Oil (SAE

Pennzoil Platinum Full Synthetic Motor Oil (SAE
  • Engineered to provide a high-quality base oil using our revolutionary PurePlus gas-to-liquid technology in combination with a high performance additive system
  • Helps protect against the effects of low speed pre-ignition (LSPI) in modern turbocharged engines
  • Provides better fuel economy which helps you drive an extra 550 miles per year vs a dirty engine
  • Offers unsurpassed wear protection by keeping engine parts from coming into contact
  • Delivers outstanding piston cleanliness, keeping pistons up to 50% cleaner than required by the toughest industry standards- based on Sequence IIIH engine test results

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