Oil Filler Cap
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Mr. Gasket Oil Filler Cap

Part No. 9815 Warranty Details  
Quantity  Add to Cart

Fit of this part varies by vehicle & equipment specs Type of Fit

Mr. Gasket manufactures a variety of performance parts and accessories, including carburetor and fuel accessories, cooling system accessories, engine components, fasteners, gaskets, and suspension and drive line components. Besides gaskets and fasteners, the Mr. Gasket brand provides a variety of performance and racing products for all parts of your vehicle including: carburetor and fuel accessories, chrome-plated accessories, cooling system accessories, engine components, ignition and electrical accessories, shifter accessories, specialty tools and suspension and driveline components. Mr .Gasket also includes Ultra-Seal gaskets and fasteners.

Product Features:
  • Chrome plated for great looks
  • Fits valve covers with 122 in. diameter openings
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by PowerReviews
Mr. GasketOil Filler Cap

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

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Check fitment


from undisclosed

Verified Buyer

Comments about Mr. Gasket Oil Filler Cap:

Nice cap but didn't fit my 94 wrangler

(23 of 38 customers found this review helpful)


Great Quality and Looks Great


from Central TX

Verified Reviewer


  • Attractive Design
  • Durable
  • Easy To Install
  • Looks great with nice fit


    Best Uses

    • Custom valve covers
    • Everyday Driving
    • Restoration

    Comments about Mr. Gasket Oil Filler Cap:

    I perchased this oil cap for my new jeep 4.0l that has a custom aluminim valve cover,adds really nice touch to the black and polished aluminim cover. I had to modify the cap to fit in the cap hole shaved off about 1/16of an inch now it works flawlessly.

    • Car & Truck:
    • Auto Enthusiast, Jeeps

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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.

    1 Question | 1 Answer
    Displaying question 1
    • Q:

      will this fit my jeep 1988 4.2 in line 6 cyl
      Asked on 3/18/2015 by Greg from mableton ga

      1 answer



        Hi Greg, I'm glad to assist you! This Mr. Gasket Oil Filler Cap - Part No. 9815 is universal and does not have any applications associated with it. It is designed to fit most popular and aftermarket valve covers with 1-1/4 inch diameter holes. This measures 5/8 inch tall by 2-3/16 inch diameter.

        Answered on 3/19/2015 by Solomon
    Displaying question 1

    Do you have a question about this product? 

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    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.