1978 Mercury Marquis Engine Additives
Keep Your 1978 Mercury Marquis in Top Shape with Quality Engine Additives
Whether you’re repairing or upgrading your Engine Additive, using high-quality parts is key to keeping your 1978 Mercury Marquis looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Posi Units and Components. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mercury Marquis Engine Additive at Advance Auto Parts is around $504.49, with a range that starts at $339.99 and goes up to $668.99. With 2 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Grip LOK Traction System and Lock Right Locker start at just $339.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Additive, don’t forget to check out other key components like Coolant/Antifreeze and Fluids. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Marquis in peak condition, inside and out.
Find Your Specific 1978 Mercury Marquis Engine Additives
Looking for the perfect Engine Additive for your 1978 Mercury Marquis? You’re in the right place. Below, you’ll find links to various types of Engine Additives that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Additives, ensuring durability and a precise fit for your Mercury Marquis. Whether you’re driving a 1978 model or another popular model year like
1971,
1972,
1973,
1974,
1975,
1976,
1977,
1982, and
1983, we’ve got you covered. Purchasing Engine Additives from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Additives that fit your vehicle.
Essential 1978 Mercury Marquis Engine Additives
Powertrax – Lock Right Locker (Part No.1810-LR)
from
$339.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles. Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction. Powertrax® = Extreme Traction Systems!
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Powertrax – Grip LOK Traction System (Part No.LK109028)
from
$668.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
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Powertrax – Lock Right Locker (Part No.1820-LR)
from
$442.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles. Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction. Powertrax® = Extreme Traction Systems!
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Popular 1978 Mercury Marquis Engine Additives Categories
Most Popular Posi Units and Components for 1978 Mercury Marquis
Enhance your 1978 Mercury Marquis with one of the 2 Posi Units and Components we have in stock, starting at just $339.99.
Powertrax – Grip LOK Traction System (Part No.LK109028)
from
$668.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
See More
Powertrax – Lock Right Locker (Part No.1810-LR)
from
$339.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.Powertrax® offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.Powertrax® = Extreme Traction Systems!
See More
FAQs for 1978 Mercury Marquis Engine Additives
What are the best-selling Engine Additives for 1978 Mercury Marquis?
Out of 2 Engine Additives that fit 1978 Mercury Marquis, the following parts are the top sellers:
- Grip LOK Traction System (11470449) – $668.99
- Lock Right Locker (10461184) – $339.99
What’s the price range for 1978 Mercury Marquis Engine Additives?
The prices of Engine Additives for the 1978 Mercury Marquis range from $339.99 up to $668.99 for the most premium parts.
What is the average price of an Engine Additive for a 1978 Mercury Marquis?
The average price for Engine Additives for the 1978 Mercury Marquis is $504.49. Keep in mind the variety of part types within our Engine Additive category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Additives for other Mercury Marquis model years?
What are the cheapest Engine Additives for my 1978 Mercury Marquis?
The cheapest 1978 Mercury Marquis Engine Additives we carry are:
- Lock Right Locker (10461184) – $339.99
- Grip LOK Traction System (11470449) – $668.99
Does Advance Auto Parts sell Engine Additives for any other 1978 Mercury models?
Yes. We stock Engine Additives for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Cougar Engine Additives, 1978 Grand Marquis Engine Additives, 1978 Zephyr Engine Additives, 1978 Monarch Engine Additives, and 1978 Bobcat Engine Additives.
What types of Engine Additives do you sell for my 1978 Mercury Marquis?
We currently have just 1 Engine Additive in stock for a 1978 Mercury Marquis, and as of 11/2/25, it is a Posi Units and Component.
Can I get help with 1978 Mercury Marquis Engine Additive orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Engine Additives and more.
What is your return policy for Mercury Marquis Engine Additives?
Advance Auto Parts keeps returns simple. For new Mercury Marquis Engine Additives and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.