Do I need to use a Royal Purple filter to get the best performance of this oil or will any filter do?

I use fram filters. In the vehicles that I need to be very reliable I use the expensive Walmart Fram Filters. In my around town vehicles I use the cheap fram filters. I have had no problem with any of them. You will enjoy the Royal Purple. Just make sure it shows up on the oil dip stick. My Ford F150 used 9 quarts the 1st time. Not the typical 6 quarts. Now it uses a little over 7 quarts.

What is the shelf life of this oil

This oil is synthetic. It will not break down or become contaminated like traditional oils may. That said, only buy what you think you'll use in the next 60 months. If you buy this 5 gallon model, consider how many other vehicles can benefit from it. I have two cars, both of them use 5-20. So for me, this is a no-brainer purchase.

some have dexos some dont, why? mine arrived with no dexos logo

The dexos specification applies to most, but not all, GM vehicles model year 2011 or later. (I) have a nissan, I do NOT use Dexos. I've no idea if Dexos is superior in MY vehicle but since it is NOT specified, I don't use it.

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🛢️ Royal Purple: The high-performance oil your engine deserves—don’t let your ride settle for less!

SEAMLESS UPGRADE - Compatible with mineral and synthetic oils—no special procedures needed.
EMISSION SYSTEM GUARDIAN - Protects your catalytic converter for cleaner, eco-friendly drives.
ENGINE LONGEVITY UNLOCKED - Advanced synthetic formula reduces wear and extends engine life.
FUEL EFFICIENCY MAXIMIZED - Optimized viscosity enhances mileage, saving you money at the pump.
PRECISION FIT FOR YOUR RIDE - Vehicle-specific formulation ensures peak performance tailored to your car.

Royal Purple 51520 is a premium SAE 5W-20 synthetic motor oil designed for vehicle-specific applications. It combines proprietary additives with high-quality base oils to deliver superior wear protection, improved fuel efficiency, and enhanced catalytic emission system protection. Fully compatible with mineral and synthetic oils, it meets API SN, ILSAC GF-5, and Dexos1 1 standards, ensuring top-tier performance for gasoline and diesel engines.

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Viscosity	5W-20
Brand	Royal Purple
Vehicle Service Type	Car
UPC	641330515200
Automotive Fit Type	Vehicle Specific Fit
Global Trade Identification Number	00641330515200
Manufacturer	Royal Purple
Size	5 Quart (160 Ounces)(Pack of 1)
Model	51520
Item Weight	8 pounds
Product Dimensions	8.25 x 5 x 8.5 inches
Item model number	ROY51520
Manufacturer Part Number	51520
OEM Part Number	51520
Special Features	amsoil 5w-20, royal purple 5w-20, royal purple 5w20, royal purple oil 5w20

Royal Purple 51520 API-Licensed SAE 5W-20 High Performance Synthetic Motor Oil - 5 Quart, (Model: ROY51520)

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