Skip to Main Content
Sam's Club
Sam's Club
All Departments
All Services
Customer reviews for Mobil 1 FS 0W-40 Synthetic Motor Oil 1-quart bottles, 6-pk for
Mobil 1 FS 0W-40 Synthetic Motor Oil 1-quart bottles, 6-pk
4.9 out of 5 stars
stars
262 ratings97 reviews
  1. 5 stars94% (247)
  2. 4 stars4% (11)
  3. 3 stars1% (2)
  4. 2 stars0% (0)
  5. 1 star1% (2)

Member photos

Sort by |
Showing 61-70 of 97 reviews
Jan 23, 2021
Dark in MN
5 out of 5 stars review

Verified Purchase

Mobil 10W-40

Great price

Helpful?4CCC9NHOGLZR7192496989
Sep 24, 2019
EOG
5 out of 5 stars review

Verified Purchase

Excellent

Excellent deal

Helpful?4CCC9NHOGLZR7192496989
Feb 6, 2023
DoGz
5 out of 5 stars review

Verified Purchase

European car

Value for money

Helpful?4CCC9NHOGLZR7192496989
Oct 4, 2019
C7EddieH
5 out of 5 stars review

This oil is the best, PERIOD !!

New Corvette owner and I am very pleased that GM continues their partnership with Mobil 1 by using this great product as a factory fill. Nothing runs smoother, cleaner, quieter and offers more long term protection than Mobil 1. I will continue to use this product for the life of the car. I am also happy to see Mobil 1 as a sponsor of the new Corvette C8R race car that will debut in January at the 24 hours of Daytona.. Thank you for making such a great product

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Nov 21, 2025
BMW 335i
5 out of 5 stars review

Perfect for BMW 335i

Excellent choice for BMW 335i. Provides viscosity andengine requirements directed by BMW for LL01 vehicles.

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Apr 7, 2025
JTRuth
5 out of 5 stars review

Know this

This oil meets Mercedes specifications for 229.5 oil. I am not a chemical engineer and I don’t own a multi million dollar lab for the formulation testing and evaluation of engine oils. In addition Mercedes Benz has tested and evaluated this oil and approved it. I am not knocking other oil companies and I am sure they make fine products. However many high end cars come from the factory with Mobil one in their cars. Do you really these manufacturers wouldn’t put a better product in their cars if they could find it. For overall best performance I stick with the proven product and that is Mobil One. I am not going to try to out guess Mercedes Benz, Bentley, Porsche, or Corvette among others. You aren’t going to beat a man at his own game.You can use this product with complete confidence in its performance. Just use the correct product for you engines specifications is recommended by the manufacturer. Don’t get any brilliant ideas on your own and you’ll be happy.

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Jul 3, 2018
JayBro328i
5 out of 5 stars review

BMW 3 Series

I having been using Mobil 1 0W-40 in my car since I bought in 2011. I have done 10,000-mile interval oil changes and I just took my car into the dealership for the 135,000-mile checkup and they took it apart and I had no oil sludge anywhere to be found in my car. I love my car and I want to keep it FOREVER. With using Mobil 1 I trust and believe in their product and I will only use it in my car and future cars. I tell all my friends who have German cars to use Mobil 1 0W-40. It is a product the worth every penny. I had the dealership take pictures of my car when they did my 135,000-mile service so I could Have Proof that this oil works. This oil is the only oil I will ever use, It is the best. The people at Mobil 1 know exactly what they are doing, this is the BEST OIL EVER.

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Feb 6, 2018
happyvw
5 out of 5 stars review

Immediate increase in fuel savings

Was using CAM2 5w40, but it's performance was average, but better than the Castrol 5w40 in some respects - the CAM2 didn't get black as fast and didn't burn-off as quick as the Castrol. I evacuated all old oil and added the Mobil 1 0w40. The car started smoother, felt more responsive and mpg gauge was incredible! I was getting very good mileage - much higher mpg than what I was getting after a fresh oil change with the other oils I was using.

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Nov 20, 2016
Squalle
5 out of 5 stars review

MBUSA

Anyone that is is driving MBUSA anywhere in the world,i tell you to stick to mobile 1 engine oil cos they work well.I leave in Nigeria and the temperature of the sun is so high that the oil keeps the engine of my MBUSA normal and runs smooth. The european knows how to make a car run for a long by using mobile 1 engine oil.MOBILE 1 IS THE BEST engine oil so far both normal,performance and racing cars. I dont see any oil that can beat Mobile 1.

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989
Sep 29, 2016
Nat34
5 out of 5 stars review

Great cleaning ability

I just started using this oil, and it's working great! According to the PDS, it "Provides exceptional cleaning power for dirty engines". This is proving to be true, I have been looking down the oil fill cap with a flashlight since I started using this oil, and what I can see of the valve train is becoming cleaner. The other oil brands prior to Mobil left the metal with a layer of yellowish/orange varnish. The Mobil 0W-40 is cleaning the metal and it is turning the silvery and shiny color of new metal! Particularly on the shaft behind the gears of the DOHC. Overall, the engine is really smooth, really pleased with this oil! Keep up the great work!

Review from mobiloil.com
Helpful?4CCC9NHOGLZR7192496989