THMotorsports Logo

Royal Purple 51520 Synthetic Oils and Lubricants


Royal Purple

<p>Royal Purple is the synthetic engine oil that racing professionals and certified mechanics put in their own engines. Engines run cooler with Royal Purple, and so do the assemblies and other moving parts lubricated with our extended line of automotive, marine and other various lubricants.<br /><br />Royal Purple products offer superior corrosion protection.</p>

Part Number

10/04/2033 8:29 PM
Sale Price


In Stock (10+)

delivery box

Usually delivered within 2 days

No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Need help finding something?

Amazon won’t answer the phone, but we will!
Call 800-959-0145
Product Details

Royal Purple 51520 Synthetic Oils and Lubricants

Royal Purple 51520 Synthetic Motor Oil 5-qt Bottle 5w-20

The Most Advanced Synthetic Motor Oil Available. You Can Feel The Difference.

Royal Purple Motor Oil
Royal Purple specially formulated their SAE grades to be suitable for engines from trucking to general transportation. Excellent for today's turbo, supercharger and even warranty motors. Motors stay cleaner and cooler, resulting in better gas mileage, superior engine protection, and longer oil life. Now API certified.

Royal Purple Racing Oil
XPR 0w10 - Racing-9
An ultra-lite viscosity racing oil for small to medium displacement engines. Excellent drag race and motorcycle sprint racing oil.

XPR 5w20 - Racing-11
Formulated to withstand exotic fuels including alcohol, methanol, and nitrous oxide (NO2).

XPR 5w30 - Racing-21
A very versatile oil that can be used from bracket to circle track to motorcycle racing.

XPR 10w40 - Racing-41
Capable of withstanding long intervals of extreme heat and it works especially well with alcohol and methanol. Designed for marine, sprint cars, late models, endurance car racing and street hot rod engines.

XPR 20w50 - Racing-51
Formulated for sprint cars, late models, marine, and big block bracket racing. Ideal for any high output racing application under extreme heat and pressure conditions for an extended period of time.

XPR 3.1
Royal Purple's lowest viscosity engine oil designed for the most competitive classes such as Pro Stock, Pro Stock Bike, Comp Eliminator, NASCAR (Qualifying). The ultra low viscosity provides the most horsepower possible by keeping parasitic losses to an absolute minimum while providing unparalleled protection.

Royal Purple Racing ATF
Royal Purple Racing ATF incorporates our trademark high oil film strength technology 'Synerlec' resulting in 300% improved wear protection compared to traditional Type F fluids. Using a combination of select base stocks, the Royal Purple Racing ATF also excels at high temperature oxidation resistance, anti-foaming, corrosion and rust protection and longer oil life.

Royal Purple Max-ATF
This automatic transmission fluid is re-formulated to meet the specifications of a wide range of transmissions. Max ATF is a long-life transmission fluid that's proven to improve performance. It's been recognized for its ability to significantly reduce friction, so a vehicle can send more power to the ground. It's also been proven to reduce operating temperature for longer transmission life. Max ATF is fully compatible and can be mixed with other automatic transmission fluids; however, for the best results drain or flush the current oil and then fill with Max ATF.

Royal Purple Max-Gear Oil
Ultra-tough, high performance GL-4 and GL-5 gear oil provides maximum protection for heavily loaded gears and reduces friction. Eliminates gear and bearing wear under severe conditions caused by high loads or sudden shock. Run cooler, quieter, and smoother. Contains anti-slip additives for posi/anti-slip differentials.

Royal Purple Max-Tuff Assembly Lube
Formulated to create a load-bearing oil film that prevents any metal-to-metal contact during start-up. Not recommended for piston rings and contains no solids.

Royal Purple Max-EZ Power Steering Fluid
Advanced power steering fluid designed to maximize the life and performance of all power steering units. Max EZ is formulated with a blend of select synthetic base oils plus Royal Purple's proprietary Synerlec additive technology, which is proven to make equipment run cooler, smoother, longer, quieter and more efficiently. Max EZ is compatible and can be mixed with conventional power steering fluids and has excellent seal compatibility.

Royal Purple Synchromax Manual Transmission Fluid
Formulated for manual transmissions that specify automatic transmission fluid, multi-viscosity or straight or grade motor oil. Also ideal for 4x4 transfer cases and 2-cycle motorcycle gear boxes. 1 quart bottle.

Royal Purple MaxCycle Synthetic Motor Oil
Specifically formulated for both air-cooled and liquid-cooled 4-cycle engines and is compatible with wet-clutch applications. It exceeds API / JASO new warranty requirements and is compatible with other mineral and synthetic motor oils, NO FLUSHING required prior to use. 1 quart bottle.

Synthetic Motor Oil
  • 5W20
  • 5 Quart

Products specifications

SAE Motor Oils

Increased Horsepower & Torque, Saves Fuel, Reduces Wear, Reduces Emissions, Redu

The tires were delivered several days ahead of estimate provided at order time.

Easy to order!!

Found wiper I needed at a decent price.

ATL Racing Fuel Cells Tf602 "cfd" systems fuel outlet bulkhead fitting as described and quick shipping.


Great prices, much better than manufacturer website

Great product with perfect fitment and operation, unbeatable prices

fast shipping just what i ordered

Mazda cargo mat for the CX-9 SUV came within 1 week. Mat fits perfectly; just as described. Autoplicity had the best price listed for this product; we are very pleased.

wish all shipping was free bu pirces are great

Fast and awesome deals! Ordered an intake system, everywhere else wanted 300+, auto had it for 215! It's a no brainer! <br><br>Note: I only ever do 4/5 ratings... Always room to improove

I placed my order for an Autometer Shift Light and it was shipped the same day. I was provided a FedEx tracking number in the shipping confirmation email. <br><br>Very easy to select what I wanted to buy and the check out process was simple and quick.

We ordered a cover for a pickup truck bed and were so pleased that it was shipped so quickly. The price was the lowest that we found on the internet or in any of the stores where we looked. We were notified by e-mail as soon as it shipped. We will definitely shop this site again.

this was my first time shopping at Autoplicity and it kind of made me nervous not really knowing anything about their site but i recieved an order confirmation immediatley after ordering and it was shipped extremely fast.

Good pricing and quick delivery, second time to order from Autoplicity. Been using this since in 4.6 Mustang since nearly new, 90K now, historically needs qt added at 5K interval and change between 8-9K when it needs another. Only way to improve would be 6qt container as that is capacity for 4.6 in our Mustang and Mountaineer. Guess it doesn't hurt to have extra ready to use.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy