best deals this week

10 Best Stp 5w20 Full Synthetic Oil High Mileage of 2025

Tested and Reviewed: Top 10 Stp 5w20 Full Synthetic Oil High Mileage deals with expert ratings from 8.1 to a perfect 10

October 2025 Edition

|

1

Editor's Choice

9.7

Save 38%

Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT

Valvoline

Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT

38% OffFree Shipping

Editor's bottom line:

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

Main Highlights

MaxLife Technology prevents engine breakdown with 40% better wear protection than the industry standard
Includes seal conditioners to reduce oil consumption and oil leaks in high mileage engines.
Added detergents reduce sludge, corrosion, rust and deposits to help keep motors clean inside and ensure a smooth-running engine.
Advanced friction-fighting additives help maximize performance and improve fuel efficiency.
Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN
American made and formulated, from the Original Motor Oil brand trusted for more than 150 years

Picked by 293 people today

2

9.5

Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil, 5 Quarts

Castrol

Castrol GTX High Mileage 5W-20 Synthetic Blend Motor Oil, 5 Quarts

Main Highlights

Phosphorus Replacement Technology helps extend emission system life
Superior dispersancy that fights sludge build up
Exceptional oil burn-off protection exceeding industry standards* | Seal conditioners to help reduce leaks
Advanced additives that help prevent engine wear | Improved Fuel Economy**
Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM | ILSAC GF-6 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1 |* Based on API and ACEA volatility specifications | ** In 5W-20, 5W-30 and 10W-30 grades versus industry specifications

3

9.5

Save 8%

Castrol EDGE High Mileage 5W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol

Castrol EDGE High Mileage 5W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

8% OffFree Shipping

Main Highlights

Phosphorus Replacement Technology to help extend the life of the emission system
Reduces leaks, oil burnoff and power robbing deposits
15,000 miles between oil changes*
Meets or exceeds the following specifications: API SP/SN PLUS/SN/SM ILSAC GF-6 | Meets engine test requirements of Chrysler MS 6395 | Meets Ford WSS-M2C945-B1 | Meets Ford WSS-M2C960-A1
*Or one year, whichever comes first

4

9.2

Save 34%

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

Pennzoil

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

34% OffFree Shipping

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

5

9.0

Pennzoil High Mileage 5W-20 Motor Oil, 5 Quart

Pennzoil

Pennzoil High Mileage 5W-20 Motor Oil, 5 Quart

Main Highlights

High Mileage 5W-20 synthetic blend engine oil specially formulated to help stop leaks and reduce oil consumption in worn engines
Recommended for vehicles with more than 75,000 miles
Helps prevent sludge and other damaging deposits
Proven wear protection for engine parts
Suitable for modern turbocharged engines where low-speed pre-ignition protection is required
Limited warranty coverage of up to 10 years or 300,000 miles* (whichever comes first)
Meets or exceeds the following industry requirements: API SP-Resource Conserving and all previous categories; ILSAC GF-6A
Meets or exceeds the following OEM specifications: Chrysler MS-6395; Ford WSS-M2C960-B1 and WSS-M2C960-A
For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual

6

8.8

Save 8%

Mobil 1-123840 Extended Performance High Mileage 5W-20; 5QT, Gray

Mobil

Mobil 1-123840 Extended Performance High Mileage 5W-20; 5QT, Gray

8% OffFree 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

7

8.6

K&N Motor Oil: 5W-20 Synthetic Engine Oil: Premium Protection, High Mileage, 5 Quarts

K&N

K&N Motor Oil: 5W-20 Synthetic Engine Oil: Premium Protection, High Mileage, 5 Quarts

Main Highlights

PREMIUM FULL SYNTHETIC: K&N premium synthetic oil helps keep your engine running like new.
ADVANCED SYNTHAMAX TECHNOLOGY: Formulated with unique additives to help protect critical engine components.
SUPERIOR ENGINE PROTECTION: Advanced formula full synthetic oil is formulated to minimize harmful contaminants and sludge buildup.
REDUCE WEAR & TEAR: K&N ultra synthetic engine oil offers premium engine protection.
ALL WEATHER PROTECTION: K&N advanced full synthetic motor oil helps your car run smooth in both cold & hot temperature conditions.

8

8.3

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

Mobil

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

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

9

8.1

Valvoline Restore & Protect Full Synthetic 5W-20 Motor Oil 5 QT

Valvoline

Valvoline Restore & Protect Full Synthetic 5W-20 Motor Oil 5 QT

Main Highlights

The first motor oil to actively restore engine cleanliness and protect against future damage
With continuous use, Valvoline Active Clean Technology removes up to 100% of deposits while Liqui-Shield Technology helps prevent future deposits (*with regular oil changes. In Adapted Sequence IIIH Testing: Piston Deposit Removal)
79% stronger anti-wear protection than industry standards (vs. GF-6 qualified oil)
Minimizes friction between metal surfaces in your engine to help improve fuel economy
The best motor oil for any age vehicle, from your new cars first oil change to high-mileage vehicles
Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN PLUS, API SN, Resource Conserving, and all preceding API and ILSAC gasoline categories
American made and formulated, from the Original Motor Oil brand trusted for more than 150 years

10

8.1

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

Mobil

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

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

Our Best Overall Choice

9.7

Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT

Valvoline

Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT

38% 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

MaxLife Technology prevents engine breakdown with 40% better wear protection than the industry standard
Includes seal conditioners to reduce oil consumption and oil leaks in high mileage engines.
Added detergents reduce sludge, corrosion, rust and deposits to help keep motors clean inside and ensure a smooth-running engine.
Advanced friction-fighting additives help maximize performance and improve fuel efficiency.
Meets or exceeds all requirements of ILSAC GF-6A, API SP, API SN with SN Plus, API SN
American made and formulated, from the Original Motor Oil brand trusted for more than 150 years

Related Deals You Might Like for Stp 5w20 Full Synthetic Oil High Mileage

Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts

Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 5 Quarts

Castrol EDGE 5W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol EDGE 5W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

Lucas Oil Synthetic Blend High Mileage SAE 5w-20 Motor Oil_ API SP 1 Quart (Pack of 1)

Lucas Oil Synthetic Blend High Mileage SAE 5w-20 Motor Oil_ API SP 1 Quart (Pack of 1)

Royal Purple HMX w/Synerlec | High Mileage SAE 5W-20 Premium Synthetic Motor Oil |1 Quart | SKU: 17511

Royal Purple HMX w/Synerlec | High Mileage SAE 5W-20 Premium Synthetic Motor Oil |1 Quart | SKU: 17511

Quaker State Full Synthetic 5W-20 Motor Oil, 5-Quart

Quaker State Full Synthetic 5W-20 Motor Oil, 5-Quart

Castrol GTX Full Synthetic High Mileage 5W-20 Motor Oil, 5 Quart

Castrol GTX Full Synthetic High Mileage 5W-20 Motor Oil, 5 Quart

Castrol EDGE High Mileage 0W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

Castrol EDGE High Mileage 0W-20 Advanced Full Synthetic Motor Oil, 5 Quarts

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

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

K&N Motor Oil: 5W-20 Synthetic Engine Oil: Premium Protection, High Mileage, 5 Quarts

K&N Motor Oil: 5W-20 Synthetic Engine Oil: Premium Protection, High Mileage, 5 Quarts

Valvoline Restore & Protect Full Synthetic 5W-20 Motor Oil 5 QT

Valvoline Restore & Protect Full Synthetic 5W-20 Motor Oil 5 QT

Deals are Live

Special Amazon deal ends in:

Valvoline High Mileage with MaxLife Technology SAE 5W-20 Synthetic Blend Motor Oil 5 QT

Special Amazon deal ends in: