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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🛢️ Drive smarter, protect stronger with Royal Purple’s synthetic edge!

SEAMLESS UPGRADE - No special procedures needed—just swap and drive
PREMIUM PACKAGING - Durable 5-quart container designed for easy handling and storage
CERTIFIED EXCELLENCE - Meets API SN, ILSAC GF-5, and Dexos1 standards for trusted quality
UNIVERSAL COMPATIBILITY - Works flawlessly with both mineral and synthetic oils
PRECISION ENGINE OPTIMIZATION - Enhances performance with advanced proprietary additives

Royal Purple 51020 SAE 0W-20 Synthetic Motor Oil is a premium, API SN licensed motor oil engineered with proprietary additives to optimize engine performance and protection. Compatible with both mineral and synthetic oils, it meets ILSAC GF-5 and Dexos1 standards, making it ideal for gasoline and diesel engines. Packaged in a convenient 5-quart container, it’s the smart choice for millennial professionals seeking reliable, high-performance engine care.

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Manufacturer	Royal Purple
Brand	Royal Purple
Model	51020
Product Dimensions	20.96 x 12.7 x 21.59 cm; 3.63 kg
Item model number	ROY51020
Manufacturer Part Number	641330510205
OEM Part Number	51020
Item Weight	3.63 Kilograms
Viscosity	0w-20

Royal Purple51020 API-Licensed SAE 0W-20 Synthetic Motor Oil - 5qt

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