15W-50 Fully Synthetic Motor Oil (1 Quart)
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Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart)

Part No. 122377/103537 Warranty Details  
The high-viscosity formula of Mobile1 15W50 Synthetic Motor Oil provides a thick oil film for race-proven protection of critical parts in high-performance engines.

Product Features:
  • Suitable for a wide range of motorsport applications, including sprint and endurance racing on both circle and road tracks
  • SuperSyn fully synthetic formulation helps protect critical engine parts from lubricant-related failure—even in extreme driving conditions, such as racing, towing and hauling
  • Extra antiwear additives for increased protection of high-performance engines
  • Thick-film viscosity for enhanced protection of critical engine parts
  • API Service Classification SM, SL/CF
  • Official motor oil of NASCARĀ« made in the USA
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ACEA Specification:A3/B3,A3/B4
API Service Category:SJ
ATV:No
Container Size:1 qt
Container Type:Bottle
Conventional:No
Detergent or Non-Detergent:Detergent
Diesel Approved:No
High Mileage:No
Motorcycle:No
Race Only:No
Synthetic Blend:No
Synthetic:Yes
Viscosity Index:15W50

REVIEW SNAPSHOT®

by PowerReviews
Mobil115W-50 Fully Synthetic Motor Oil (1 Quart)
 
4.5

(based on 16 reviews)

Ratings Distribution

  • 5 Stars

     

    (11)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

100%

of respondents would recommend this to a friend.

Pros

  • Reduces wear (14)
  • Improves vehicle performance (12)
  • Runs clean (12)
  • Safe (7)

Cons

No Cons

Best Uses

  • Regular use (10)
  • Car (8)
  • Truck (3)
    • Reviewer Profile:
    • Auto enthusiast (6), Mechanic (5), Competitive driver (4), Casual driver (3)
    • Reviewer Profile:
    • Auto enthusiast (5)

Most Liked Positive Review

 

Keeps it protected

I use this 15W-50 Mobil 1 in my Twin Turbo Viper GTS. I put down 1298 REAR wheel horsepower, this is the ONLY oil I will use. I change it EVERY 2500...Read complete review

I use this 15W-50 Mobil 1 in my Twin Turbo Viper GTS. I put down 1298 REAR wheel horsepower, this is the ONLY oil I will use. I change it EVERY 2500 miles due more to age than miles, every time it is still great even after extreme heat of the 1/4 mile and extended Texas heat on the highway. My engine runs at 230degrees normally, the oil has never broken down on me. Great product and just as good or better as RP or RL synthetic oils, and cheaper.

VS

Most Liked Negative Review

 

Not the same M1

Mobil dropped the CE/CF designations from M1 15W-50. It used to be the best oil for Diesels. Now it is not fit for use in older Diesels.

Mobil keeps...Read complete review

Mobil dropped the CE/CF designations from M1 15W-50. It used to be the best oil for Diesels. Now it is not fit for use in older Diesels.

Mobil keeps changing the characteristics of M1, apparently to make it cheaper and less effective, and to make formulations for newer (post 07) engines. Finding a good synthetic for older Diesel engines is getting very difficult. Mobil would be better served to leave the formulation of established products alone, and use a new product name for new products.

Diesel owners, BEWARE!

Reviewed by 16 customers

Displaying reviews 1-10

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(4 of 9 customers found this review helpful)

 
5.0

Superior Oil

By 

from Knoxville, TN

About Me Auto Enthusiast, Boater, Mechanic

See all my reviews

Verified Buyer
Helpful Reviewer

Pros

  • Improves Vehicle Performance
  • Reduces Wear
  • Runs Clean
  • Safe

Cons

    Best Uses

    • Boat
    • RV

    Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

    I run this oil in a Mercruiser 5.7 that pushes a 6500 pound boat. It is a great oil that takes the punishment of a loaded marine engine. I run my boat year round and the multi-viscosity is great for this purpose. This oil stays much cleaner than the conventional oil I used to run. I would highly recommend it for performance based engines.

    (4 of 8 customers found this review helpful)

     
    4.0

    Good oil

    By 

    from GA

    About Me Auto Enthusiast

    See all my reviews

    Verified Buyer
    Helpful Reviewer

    Pros

    • Improves Vehicle Performance
    • Reduces Wear
    • Runs Clean

    Cons

      Best Uses

      • Car
      • Regular Use

      Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

      Good oil, no complaints

      (5 of 9 customers found this review helpful)

       
      5.0

      Been Using for Years!

      By 

      from Blacksburg VA

      About Me Auto Enthusiast

      Pros

      • Improves Vehicle Performance
      • Reduces Wear
      • Runs Clean

      Cons

        Best Uses

        • Car
        • Regular Use
        • Truck

        Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

        I currently use this in a modded v8 (dodge magnum) and had used this in a modded inline 4 (bmw m10). I had rebuilt the engine in the 4 and after two years from coninuous use, there was no evidence of wear, and with the valve cover off, the head looked as if it just came from the machine shop (shiny and no sludge). The car had a large cam (shcrick 292) and the lobes still looked new as well as no abnormal wear on the rocker arms. The zinc content (1200ppm) allows it to be ok for older flat tappet engines.

        Since the oil is full synthetic, you could use it in cold temp environments. I live where it can get to -20F and still start and drive fine. (I wouldnt redline until engine is warm...should be common sense with any oil) Some may say its too thick, well synthetic composition is NOT the same as conventional oil. The flow characteristics are better COLD/HOT in synthetic oils...PERIOD.

        I came from using Castrol in everything but oil consumption and overall quality is what made me change. I'll continue to use this brand and type of oil in anything I own.

        (16 of 30 customers found this review helpful)

         
        5.0

        Using it for years

        By 

        from Lexington, KY

        About Me Auto Enthusiast

        Verified Buyer
        Helpful Reviewer

        Pros

        • Improves Vehicle Performance
        • Reduces Wear
        • Runs Clean

        Cons

        • None

        Best Uses

        • Car
        • Regular Use

        Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

        Keeps engine running smoothly for years. Change every 5K miles but could go longer. Cheaper than a rebuild.

        (16 of 34 customers found this review helpful)

         
        4.0

        Good Oil

        By 

        from Traverse City, MI

        Verified Buyer
        Helpful Reviewer

        Pros

        • Reduces Wear

        Cons

        • Pricey poor value

        Best Uses

          Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

          It's oil. I use it in the engine.

          (15 of 30 customers found this review helpful)

           
          5.0

          I would buy this product again and again

          By 

          from Concord, NH

          About Me Auto Enthusiast, Casual Driver

          See all my reviews

          Ask me a question

          Verified Buyer
          3 or more reviews submitted

          Pros

          • Improves Vehicle Performance
          • Reduces Wear
          • Runs Clean
          • Safe

          Cons

          • None

          Best Uses

          • Car
          • Truck

          Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

          Best Oil for my car!

          (28 of 58 customers found this review helpful)

           
          5.0

          Great product & super $$$

          By 

          from Lake County, IN

          About Me Auto Enthusiast, Casual Driver, Competitive Driver, Mechanic

          See all my reviews

          Verified Buyer
          Helpful Reviewer

          Pros

          • Improves Vehicle Performance
          • Reduces Wear
          • Runs Clean
          • Safe

          Cons

            Best Uses

            • Car
            • Regular Use
            • Truck

            Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

            Not the cheapest but one of the best!

            (22 of 41 customers found this review helpful)

             
            1.0

            Not the same M1

            By 

            from Billings, MT

            About Me Mechanic

            Pros

              Cons

              • Signation for15W-50 Now

              Best Uses

                Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

                Mobil dropped the CE/CF designations from M1 15W-50. It used to be the best oil for Diesels. Now it is not fit for use in older Diesels.

                Mobil keeps changing the characteristics of M1, apparently to make it cheaper and less effective, and to make formulations for newer (post 07) engines. Finding a good synthetic for older Diesel engines is getting very difficult. Mobil would be better served to leave the formulation of established products alone, and use a new product name for new products.

                Diesel owners, BEWARE!

                (29 of 59 customers found this review helpful)

                 
                5.0

                The best lubricant!

                By 

                from St. Louis

                About Me Auto Enthusiast, Competitive Driver, Mechanic

                See all my reviews

                Verified Buyer
                Helpful Reviewer

                Pros

                • Improves Vehicle Performance
                • Reduces Wear
                • Runs Clean
                • Safe

                Cons

                  Best Uses

                  • Car
                  • Regular Use

                  Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

                  I own expensive cars and they deserve the best.

                  (29 of 54 customers found this review helpful)

                   
                  5.0

                  Mobile 1 synthetic IS #1

                  By 

                  from Westmoreland, TN.

                  About Me Auto Enthusiast, Life long motorcyclist

                  Verified Buyer
                  Helpful Reviewer

                  Pros

                  • Improves Vehicle Performance
                  • Reduces Wear
                  • Runs Clean
                  • Safe

                  Cons

                  • NO CONS

                  Best Uses

                  • After break in period
                  • Regular Use

                  Comments about Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart):

                  This oil makes my bike come alive. It just runs so smooth with this oil , I'll never use non synthetic oil in my bike again.

                  Displaying reviews 1-10

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                  Do you have questions about this product?

                   

                  Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

                  4 Questions | 5 Answers
                  Displaying questions 1-4
                  • Q:

                    Can this 15 W-50 synthetic oil be used in my 2006 Toyota Tacoma pre-runner?
                    Asked on 9/29/2016 by julio from Jacksonville,AL

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Hi Julio, happy to help you! This Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart) (Part No. 122377/103537) is universal and not vehicle specific. Mobil 1 15W-50 is recommended for all types of vehicles, suitable for use in high-performance turbo-charged, supercharged gasoline and diesel multi-valve fuel injected engines found in passenger cars, light vans and trucks. It meets or exceeds the requirements of: API, SN, SM, SL, SJ, ACEA, and A3/B3. It is not recommended for 2-Cycle or aviation engines, unless specifically approved by the manufacturer.

                      Answered on 9/30/2016 by Steve from AAP
                  • Q:

                    I noticed this 15W-50 getting scarce to find. Is it discontinued? If so, can you recommend a 2nd choice. I've been using this product in my 2000 dodge dakota 4.7 since it was new.
                    Asked on 10/28/2013 by lucki from Granada Hills CA

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Hi Lucki, this Mobil1 15W-50 Fully Synthetic Motor Oil (1 Quart) - part# 103537/98JD41 is not discontinued. However, this item is not available for shipping. You can pick this product from your nearest Advance Auto Parts store.

                      Answered on 10/29/2013 by Vincent from AAP
                  • Q:

                    I'M told that my '89 Por. Carrera should have 12 to 14% zddp.
                    Moblil 1 15/50 HAS ONLY 10%. iS THIS CORRECT? iS MY VALVE TRAIN
                    PROTECTED?
                    Asked on 5/6/2011 by Anonymous from Las Vegas,Nv.

                    2 answers

                    • CUSTOMER CARE

                      A:

                      No worries, it is well protected, If you have any problem with the valve just replace the part for the better performance.

                      Answered on 7/7/2011 by Anonymous
                    • A:

                      the issue is your lifters and cam needs this if you have flat top lifters. Mobil 1 15W-50 has 1200 PPM of Phosphorus and 1300 PPM of Zinc per Mobil's specs which is sufficient ZDDP for an older car. Shouldn't use it however if you have a catalytic converter. Lower viscosity oil even with Mobil 1 may not have enough ZDDP in it to protect your lifters and cams from rapid wear.

                      Answered on 2/29/2012 by jim from minnesota
                  • Q:

                    Can I use this in my 2007 Triumph Speedmaster?
                    Thanks,
                    Rob
                    Asked on 11/12/2010 by Rob from La grange, Ky

                    1 answer

                    • CUSTOMER CARE

                      A:

                      Mobile1 10W-40 motorcycle oil is the oil you need.

                      Answered on 11/17/2010 by Mike the Auto Parts Master from AAP
                  Displaying questions 1-4

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