10 Best Mobil 1 5w20 High Mileage Full Synthetic Motor Oil 5w 20 1 Qt of 2025

Tested and Reviewed: Top 10 Mobil 1 5w20 High Mileage Full Synthetic Motor Oil 5w 20 1 Qt deals with expert ratings from 8.1 to a perfect 10

October 2025 Edition

Editor's Choice

9.7

Save 34%

Pennzoil

Pennzoil Platinum High Mileage Full Synthetic 5W-20 Motor Oil, 5 Quart

34% OffFree Shipping

Editor's bottom line:

“This mobil 1 5w20 high mileage full synthetic motor oil 5w 20 1 qt is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Full synthetic 5W-20 engine oil designed for vehicles with more than 75,000 miles
Backed by a 15,000-mile protection guarantee* to keep you covered between oil changes and in the long run
Keeps pistons cleaner than required by the toughest industry standard (based on Sequence IIIH results)
Proven to help stop leaks for engines with more than 75,000 miles
Formulated to deliver less oil burn-off than high-mileage motor oils made from crude oil
Provides better fuel economy (based on the latest industry standards) and helps protect horsepower
Provides faster low-temperature oil flow and protects in extreme heat
Exceeds the requirements of the following industry specifications: API SP, API SP-Resource Conserving, and all previous categories; ILSAC GF-6A
Meets or exceeds the following OEM requirements: Chrysler MS-6395; Ford WSS-M2C960-A1
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

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Picked by 185 people today

9.5

Save 10%

Mobil

Mobil 1 Truck & SUV Oil 5w20 1 Quart

10% OffFree Shipping

Main Highlights

Mobil 1 Truck & SUV Oil 5w20 1 Quart

Show Price

9.5

Save 23%

Mobil

Mobil Full Synthetic Motor Oil 5W-20, 1 Quart

23% OffFree Shipping

Main Highlights

Guaranteed protection for up to 7,500 miles between oil changes
Provides excellent resistance to oil breakdown for long-lasting protection
Balanced formulation helps prevent engine deposits and sludge buildup

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9.2

Save 8%

Mobil

Mobil 1-123837 Extended Performance High Mileage 0W-20; 5QT, Gray

8% OffFree Shipping

Main Highlights

Mobil 1 Extended Performance High Mileage full-synthetic motor oil 0W-20 is designed for engines with over 75,000 miles to go up to 20,000 miles between oil changes.*
Utilizes Mobil 1s Triple Action+ Formula to combine outstanding engine performance, protection, and cleanliness with the added benefit of power
Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -40 degrees F)
Helps extend engine life by working to prevent damaging deposits and sludge buildup

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9.0

Mobil

Mobil Full Synthetic Motor Oil 5W-20, 1 Quart (6-pack)

Main Highlights

Mobil Full Synthetic 5W-20 motor oil is formulated for vehicles upgrading from conventional oil or synthetic blend, or requiring full synthetic motor oil
Provides guaranteed protection that's 1.5X longer than our conventional and synthetic blend oils, up to 7,500 miles between oil changes*
Helps to prevent sludge and deposit formation, to help reduce engine wear, and has balanced additive system formulation
Provides excellent resistance to oil breakdown, for proven long-lasting protection, and maintains oil viscosity at high operating temperatures
Recommended for all types of gasoline-powered vehicles, including those with turbocharged engines, and meets API SP resource-conserving

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8.8

Mobil

Mobil Full Synthetic High Mileage Motor Oil 5W-20, 1 Quart (6-pack)

Free Shipping

Main Highlights

Mobil Full Synthetic High Mileage 5W-20 motor oil is designed for vehicles with over 75,000 miles, upgrading from a conventional or synthetic blend, or requiring full synthetic motor oil
Provides guaranteed protection that's 1.5X longer than our conventional and synthetic blend oils, up to 7,500 miles between oil changes*
Helps to prevent oil leaks, sludge, and deposit formation to help reduce engine wear with a balanced additive system formulation and extra seal conditioner
Provides excellent resistance to oil breakdown, for proven long-lasting protection, and maintains oil viscosity at high operating temperatures
Recommended for all types of gasoline-powered vehicles, including those with turbocharged engines, and meets API SP resource-conserving

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8.6

Mobil

Mobil 1 (120455-6PK) High Mileage 5W-20 Motor Oil - 1 Quart, (Pack of 6)

Main Highlights

Package Dimensions: 9.6 L x 7.4 H x 9.2 W (inches)
Package Weight : 12 pounds
Country of Origin : United States
Part number: 120455-6PK

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8.3

Save 5%

Mobil

Mobil 1 Extended Performance Full Synthetic Motor Oil 5W-20, 1 Quart (6-pack)

5% Off

Main Highlights

5W20
1 Quart Bottles
Set of 6

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8.1

Save 7%

Mobil

Mobil 1 High Mileage Full Synthetic Motor Oil 5W-20, 5 Quart (Pack of 2)

7% Off

Main Highlights

The information below is per-pack only
Mobil 1 High Mileage full-synthetic motor oil 5W-20 is designed for engines with over 75,000 miles to go up to 10,000 miles between oil changes.*
Utilizes Mobil 1s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness
Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -30 degrees F)
Mobil 1 is specially formulated to help remove sludge and lower engine temperatures

Show Price

8.1

Mobil

Mobil 1 Extended Performance High Mileage Full Synthetic Motor Oil 5W-20, 1 Quart (6-pack)

Free Shipping

Main Highlights

Mobil 1 Extended Performance High Mileage full-synthetic motor oil 5W-20 is designed for engines with over 75,000 miles to go up to 20,000 miles between oil changes.*
Utilizes Mobil 1s Triple Action+ Formula to combine outstanding engine performance, protection, and cleanliness with the added benefit of power
Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -40 degrees F)
Helps extend engine life by working to prevent damaging deposits and sludge buildup

Show Price

Our Best Overall Choice

Best Choice

9.7

Pennzoil

Pennzoil Platinum High Mileage Full Synthetic 5W-20 Motor Oil, 5 Quart

34% OffFree Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

Full synthetic 5W-20 engine oil designed for vehicles with more than 75,000 miles
Backed by a 15,000-mile protection guarantee* to keep you covered between oil changes and in the long run
Keeps pistons cleaner than required by the toughest industry standard (based on Sequence IIIH results)
Proven to help stop leaks for engines with more than 75,000 miles
Formulated to deliver less oil burn-off than high-mileage motor oils made from crude oil
Provides better fuel economy (based on the latest industry standards) and helps protect horsepower
Provides faster low-temperature oil flow and protects in extreme heat
Exceeds the requirements of the following industry specifications: API SP, API SP-Resource Conserving, and all previous categories; ILSAC GF-6A
Meets or exceeds the following OEM requirements: Chrysler MS-6395; Ford WSS-M2C960-A1
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual