MOTORAD SX-P78E Fuel Tank Gas Cap Storage Air

( Brand: Motorad ), ( Manufacturer Part Number: SX-P78E ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.000 ), ( Item Length: 3.250 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C282 43-10 ), ( Compatible Model: Glc ), ( Compatible Year: 1985 1984 1983 1982 1981 1980 1979 1978 1977 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Motorad Fuel Tank Cap )

Review MOTORAD Fuel Tank Cap Mazda Gas Delivery Storage Air fits GLC GL 1977–1985

The **Motorad SX-P78E Fuel Tank Cap** is a meticulously crafted, high-performance replacement part designed to enhance both the aesthetic and functional integrity of your 1977 1985 Mazda GL-C (also known as the Mazda RX-2 or RX-3 in some markets), particularly models equipped with the air-cooled gasoline engine. Engineered to meet the exacting standards of classic sports cars, this fuel tank cap is not merely a functional component but a statement of precision engineering and attention to detail. Constructed from durable, high-grade plastic, the cap features a sleek, aerodynamic design that seamlessly integrates with the vehicle s original styling, ensuring a factory-like appearance while maintaining the integrity of the fuel system. The cap is equipped with a secure, tamper-resistant locking mechanism, complete with a robust metal latch and a precision-machined gasket to prevent fuel vapors from escaping, thereby preserving fuel efficiency and reducing environmental impact. Its ergonomic handle is contoured for easy grip, allowing for effortless installation and removal, even in tight spaces or under less-than-ideal conditions. Beyond its practical benefits, the Motorad SX-P78E cap is also a nod to the vehicle s heritage, offering a polished finish that complements the matte or glossy surfaces of the original Mazda GL-C s fuel tank. Whether you re a restorer aiming for showroom perfection or an enthusiast seeking a reliable upgrade, this cap delivers a blend of form and function that elevates both the performance and presentation of your beloved classic.

Buying a replacement fuel tank cap for a 1977 1985 Mazda GL-C (specifically the **Motorad SX-P78E fuel tank cap**) involves weighing several factors, including compatibility, quality, cost, and availability. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Motorad SX-P78E Fuel Tank Cap**

1. **Exact Fit and Compatibility**

The Motorad SX-P78E cap is designed specifically for the 1977 1985 Mazda GL-C, including the fuel storage air vent system. This ensures a proper seal, preventing fuel fumes from escaping and reducing the risk of vapor lock or fuel system leaks. Many aftermarket or generic caps may not match the exact dimensions or threading, leading to improper installation or functionality issues.

2. **High-Quality Materials**

Motorad is known for producing durable, corrosion-resistant parts. The SX-P78E cap is likely made from sturdy plastic or metal (depending on the model year) with reinforced seals, which helps maintain fuel system integrity over time. This reduces the likelihood of premature wear or failure, especially in older vehicles prone to rust or degradation.

3. **Proper Venting Functionality**

The GL-C s fuel tank cap includes an air vent to allow fuel vapors to escape when the tank is full, preventing pressure buildup. A compatible cap ensures this vent works correctly, which is critical for smooth fuel delivery and preventing fuel pump strain. A mismatched or poorly designed cap could disrupt this system, leading to fuel starvation or other issues.

4. **Ease of Installation**

Since the cap is designed for the GL-C, it should fit the fuel tank opening without modification. This avoids the hassle of drilling, filing, or using adapters, which can be necessary with non-OEM or incompatible parts. The threading and mounting mechanism should align seamlessly with the vehicle s fuel tank.

5. **Reliability and Longevity**

Motorad parts are often built to last, reducing the need for frequent replacements. This is particularly valuable for older vehicles where fuel system leaks or cap failures can be costly to diagnose. A well-fitted, high-quality cap minimizes the risk of recurring problems.

6. **Support for Vintage Vehicle Maintenance**

For owners of classic or restored Mazda GL-Cs, using OEM or high-quality aftermarket parts like the Motorad cap helps preserve the vehicle s authenticity and performance. It also aligns with best practices for maintaining vintage cars, where original or exact-replica parts are preferred.

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### **Cons of buying a Motorad SX-P78E Fuel Tank Cap**

1. **Cost Compared to Generic Alternatives**

The Motorad SX-P78E cap may be more expensive than generic or no-name replacements available from big-box auto parts stores or online marketplaces. While the price difference is often justified by quality, budget-conscious buyers might opt for cheaper options, risking compatibility or durability issues.

2. **Limited Availability**

Motorad parts, while high-quality, may not be as widely stocked as major brands like AC Delco, Bosch, or even generic OEM replacements. This could require ordering from specialty suppliers, which may involve longer lead times or shipping costs. Some buyers might struggle to find the part locally.

3. **Potential for Overkill**

If the original cap on the GL-C was already functioning correctly, replacing it with a new Motorad cap might be unnecessary unless there are signs of wear, leaks, or venting problems. For vehicles in good condition, the cost of a new cap could be seen as a preventative expense rather than a pressing need.

4. **Mixed Reviews on Aftermarket Brands**

While Motorad is reputable, some buyers report variability in quality depending on the specific batch or supplier. Rarely, a cap might arrive damaged or not fit perfectly due to manufacturing inconsistencies. This is less common with well-established brands but is still a risk to consider.

5. **Alternative Options May Suffice**

For owners who prioritize cost savings, OEM caps (if available) or high-quality generic caps from brands like **Spectre, ACDelco, or Bosch** may offer similar performance at a lower price. These alternatives often meet industry standards and can be just as reliable for basic fuel system function.

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### **Conclusion**

The **Motorad SX-P78E fuel tank cap** is an excellent choice for Mazda GL-C owners who prioritize **exact compatibility, durability, and proper venting functionality**. Its advantages in fitment, material quality, and reliability make it a strong option for those who want to avoid common issues like fuel leaks or venting problems. However, the higher cost and potential availability challenges may deter buyers who are looking for a budget-friendly or widely accessible solution.

For most GL-C owners experiencing **leaks, venting issues, or cap failure**, the Motorad cap is a **highly recommended** replacement due to its specialized design and quality. If the original cap is still functional and the vehicle is in good condition, the expense may not be justified. In such cases, a thorough inspection of the existing cap and fuel system is advisable before purchasing a replacement.

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### **Final Recommendation**

- Your current cap is damaged, leaking, or not venting properly.

- You want a **direct OEM replacement** with guaranteed compatibility.

- You prioritize **long-term reliability** and are willing to invest in a high-quality part.

- You own a restored or well-maintained GL-C where authenticity and performance matter.

- Your current cap is working fine, and you re looking to save money.

- You can find a **high-quality generic cap** (e.g., Spectre or Bosch) that fits and meets your needs at a lower cost.

- You re unable to locate the Motorad part easily and prefer a more widely available option.

For the average GL-C owner facing a cap-related issue, the **Motorad SX-P78E is the best choice** for ensuring a proper seal and venting system. If budget is a concern, verify the condition of the existing cap before committing to a replacement.

Details:

MotoRad Fuel Tank Cap for 1977 1985 Mazda GLC Gas Delivery storage Air Gl: Status: In Stock.

part #: sxp78e prices

• $20.47-$25.84

specifications fueltanksysteme:

• for models: Glc, Gl
• for makes: Mazda
• for years: 1977-1985
• brand: Motorad
• mpn: Sx-p78e
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.000
• item length: 3.250
• manufacturer warranty: 1 Year
• ipn: C282 43-10
• compatible model: Glc
• compatible year: 1985 1984 1983 1982 1981 1980 1979 1978 1977
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Motorad Fuel Tank Cap

general fueltanksysteme:

• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks
• condition: New

payments fueltanksysteme:

• wallet: Google-pay
• other
• credit card: Diners-club

seller fueltanksysteme:

• # reviews: 641674
• rating: 99.6%
• city: Indianapolis, Indiana

offer fueltanksysteme:

• quantity: 10
• started: April 6, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

returns fueltanksysteme:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping fueltanksysteme:

• transit: 3-7 Days
• type: Fixed
• cost: $0.00
• service: Standard, Expedited
• class: Standard, Expedited

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