I have seen Royal Purple oil being used in race engines for years....what makes Royal Purple Full Synthetic better than say.. Mobil1 Full Synthetic?

Royal One is considered one of the better synthetic oils. Notice it does not say 100% synthetic. Only if they say 100% are they completely free of any petroleum based oil. Also note sticker says approved by Petroleum standards. Mobil 1 says this too. A 100% synthetic oil requires no additives. In Europe, fully synthetic = 100% synthetic. In the United States it doesn't.

Is this oil ok to use in my supercharged fr-s using e85 fuel? i change my oil every 5k miles

Looks like you keep up with maintenance, so yes, I think it would suit your needs. The first oil change with Royal Purple is a time in which the oil acclimates to its engine environment. You can still get 5000 miles out of it, but with the second oil change you will see a subtle change with oil life extending beyond the 5000 to 6000 or more. In my case, I am getting 10000 miles between oil changes, and the oil still has no burned smell to it. I do recommend using a good oil filter as well, like Wix, or something that can take the temperature ranges. If your engine is using oil, then I'd be cautious in making the switch, otherwise I have no regrets. With the last rebuild on my 1988 Jeep Wrangler I started it off with Royal Purple and haven't looked back. Engine runs smoother and I get the extended oil mileage.

Does this work for the 2013 toyota prius v? i am looking for this with 75,000+ miles with royal purple hmx high mileage synthetic 0w-20 ilsac gf-5 mul

I use it in my 2017 prius 2. It works great. Comes out looking damn near new after 10k miles. When i need to switch to high mileage oil, i will use HMX.

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Royal Purple ROY51020 API-Licensed SAE 0W-20 High Performance Synthetic Motor Oil - 5 qt.

Royal Purple ROY51020 API-Licensed SAE 0W-20 High Performance Synthetic Motor Oil - 5 qt.

Product ID: 2251872

Details

Brand
Royal Purple
Liquid Volume
4.73 Liters
Package Information
Bottle
Vehicle Service Type
Truck
Viscosity
0W 20 SAE

⛽Boosts fuel efficiency

⚙️0W-20 SAE Grade for optimal viscosity

🛡️Superior wear & corrosion protection

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€ 123.33

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Royal Purple
Liquid Volume
4.73 Liters
Package Information
Bottle

Description

🛢️ Elevate your engine’s game with Royal Purple’s high-performance synthetic power!

ENGINE ARMOR - Advanced synthetic formula delivers unmatched wear protection for your engine’s longevity.
ETHANOL READY - Optimized compatibility with ethanol-blended fuels for modern engine demands.
SEAMLESS UPGRADE - API licensed and fully compatible with mineral and synthetic oils—no hassle, just performance.
ECO GUARD CATALYST - Protects expensive catalytic converters, ensuring your vehicle stays green and compliant.
FUEL SMART FORMULA - Enhances fuel efficiency to keep your rides smooth and your wallet happy.

Royal Purple ROY51020 is a premium API SN licensed SAE 0W-20 synthetic motor oil designed for trucks and gasoline/diesel engines. It combines proprietary additives with high-quality base oils to deliver superior wear protection, improved fuel efficiency, and enhanced catalytic converter protection. Fully compatible with ethanol fuels and other oil types, it supports engine longevity and meets ILSAC GF-5 and Dexos1 1 standards.

Specifications

ASIN	B005SEK9IQ
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#368 in Automotive ( See Top 100 in Automotive ) #12 in Motor Oils
Brand	Royal Purple
Brand Name	Royal Purple
Compatible with Vehicle Type	Truck
Container Type	Bottle
Customer Reviews	4.9 out of 5 stars 2,695 Reviews
Global Trade Identification Number	00641330510205
Included Components	oil
Item Type Name	Royal Purple 51020 API-Licensed SAE 0W-20 High Performance Synthetic Motor Oil - 5 qt.
Item Weight	8 Pounds
Liquid Volume	4.73 Liters
Manufacturer	Royal Purple
Manufacturer Part Number	641330510205
Manufacturer Warranty Description	30 Days
Model Number	ROY51020
Package Information	Bottle
Part Interchange Info	51020
SAE J300 Viscosity Grade	0W-20
Size	Pack of 1
UPC	641330510205
Unit Count	160.0 Fluid Ounces
Vehicle Service Type	Truck
Viscosity Level	Low

Reviews

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11.04.2026

R**R

17.04.2026

C**K

1.02.2026

S**.

20.04.2026

T**.

12.03.2026

M**S

25.01.2021

K**P

12.04.2026

J**S

14.02.2026

B**.

22.10.2024

A**N

7.03.2025

R**S

1.04.2024

N**S

29.11.2023

M**.

1.03.2026

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