Is this oil worth it over a conventional high-mileage oil?

It is a full synthetic with seal conditioners and a long drain rating, so it suits engines you plan to keep. Conventional high-mileage oils cost less but need shorter intervals.

How often should I change it?

Mobil 1 rates protection up to 25,000 miles or one year, whichever comes first. Follow your owner's manual and the oil life monitor, and use a filter rated for the interval.

Does it stop oil leaks?

Seal conditioners can soften aging seals and reduce seepage. They will not fix a torn gasket or worn rings.

What does the 5W-30 grade mean?

It flows like a 5-weight oil when cold and protects like a 30-weight when hot. Use the grade your engine calls for.

Does it meet ILSAC GF-7?

Yes. It meets ILSAC GF-7, which adds protection against low-speed pre-ignition and timing chain wear.

Can I use it in a new engine?

It works in engines of all ages, but a new car under warranty should use the grade and spec in its manual.

What do buyers say about the Mobil 1 Extended Performance High Mileage Motor Oil?

Buyers like: Exceptional performance in high-mileage vehicles, engines running smoothly and quietly beyond 200,000 miles; Dramatic improvements in engine responsiveness and reduced noise; Extends oil change intervals to 20,000 miles. Common complaints: A few note occasional top-offs needed in older engines; One reviewer gave three stars because the page didn't identify the matching oil filter.

Where can I buy the Mobil 1 Extended Performance High Mileage Motor Oil?

12 stores we checked sell it, including Amazon, AutoZone, Partzilla.com, O'Reilly Auto Parts, Walmart.

Mobil 1 Extended Performance High Mileage Motor Oil

Q: Where is the Mobil 1 Extended Performance High Mileage Motor Oil cheapest?

At Partzilla.com, for $12.38, 75% under what the other stores charge, as of our latest check.

Best price now

$12.38at Partzilla.comChecked 23 min ago

75% under what the other stores charge

Compared across 12 stores. Prices are checked against each store and labelled with when.

Visit Partzilla.com

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

What reviewers say

Buyers with high-mileage engines report smoother, quieter running and less oil consumption, and many stretch changes toward 20,000 miles. A few still need occasional top-offs in older engines.

What people mention

Engine smoothnessPraisedOwners say engines run smoother and quieter, including past 200,000 miles.
Oil consumptionPraisedBuyers report reduced oil use and better sealing in aging engines.
Change intervalPraisedReviewers extend changes toward 20,000 miles on this oil.
Top-offsMixedA few owners still add oil between changes in older engines.
ValueMixedLoyal buyers accept the higher cost of a full synthetic for long intervals.

About the Mobil 1 Extended Performance High Mileage Motor Oil

Mobil 1 Extended Performance High Mileage is a full synthetic 5W-30 motor oil made for high-mileage engines. It uses Mobil 1's Triple Action Formula to help with engine performance, protection and cleanliness.

Specialty components in the synthetic oil reduce deposits and sludge buildup. This helps keep critical engine parts clean and protected for up to 25,000 miles or 1 year between oil changes, whichever comes first.

The oil meets ILSAC GF-7 standards. It offers oxidation control, protection against pre-ignition and timing chain wear, and cold-start and low-temperature performance.

Type

Full synthetic motor oil

Viscosity

5W-30

Grade

High mileage

Engine type

4-cycle

Standard

ILSAC GF-7

Change interval

Up to 25,000 miles or 1 year, whichever comes first

Sizes

1 qt, 5 qt, 24 qt

What buyers say

Buyers like

Exceptional performance in high-mileage vehicles, engines running smoothly and quietly beyond 200,000 miles
Dramatic improvements in engine responsiveness and reduced noise
Extends oil change intervals to 20,000 miles
Reduces oil consumption
Improves sealing in aging engines
Deep customer loyalty, used exclusively across multiple vehicles for years

Buyers complain about