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

Part No. 103537/98JD41 Warranty  
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

    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

    Sort by

    Displaying reviews 1-10

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    (4 of 9 customers found this review helpful)

     
    5.0

    Superior Oil

    By Steve

    from Knoxville, TN

    About Me Auto Enthusiast, Boater, Mechanic

    Verified Buyer
    Level 2

    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.

      Comment on this review(earn points)

      (4 of 8 customers found this review helpful)

       
      4.0

      Good oil

      By drfeelgood

      from GA

      About Me Auto Enthusiast

      Verified Buyer
      Level 2

      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

        Comment on this review(earn points)

        (5 of 9 customers found this review helpful)

         
        5.0

        Been Using for Years!

        By SoopaGhetto

        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.

          Comment on this review(earn points)

          (16 of 30 customers found this review helpful)

           
          5.0

          Using it for years

          By Zorba the Greek

          from Lexington, KY

          About Me Auto Enthusiast

          Verified Buyer
          Level 2

          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.

          Comment on this review(earn points)

          (16 of 32 customers found this review helpful)

           
          4.0

          Good Oil

          By Walter

          from Traverse City, MI

          Verified Buyer
          Level 2

          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.

            Comment on this review(earn points)

            (15 of 29 customers found this review helpful)

             
            5.0

            I would buy this product again and again

            By TheOne

            from Concord, NH

            About Me Auto Enthusiast, Casual Driver

            Ask me a question

            Verified Buyer
            Level 5

            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!

            Comment on this review(earn points)

            (28 of 58 customers found this review helpful)

             
            5.0

            Great product & super $$$

            By Illiana Hummer Club

            from Lake County, IN

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

            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!

              Comment on this review(earn points)

              (21 of 40 customers found this review helpful)

               
              1.0

              Not the same M1

              By Dieselmac

              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!

                  Comment on this review(earn points)

                  (29 of 59 customers found this review helpful)

                   
                  5.0

                  The best lubricant!

                  By Sparky

                  from St. Louis

                  About Me Auto Enthusiast, Competitive Driver, Mechanic

                  Verified Buyer
                  Level 2

                  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.

                    Comment on this review(earn points)

                    (29 of 54 customers found this review helpful)

                     
                    5.0

                    Mobile 1 synthetic IS #1

                    By Shooter62

                    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.

                    Comment on this review(earn points)

                    Displaying reviews 1-10

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                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                    3 Questions | 4 Answers
                    Displaying questions 1-3
                    • 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 1-3

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