What is the rated mileage for this?

I don't think oil is rated, the engine it goes in is but synthetic oil will last longer than regular oil.

Is it ok to top off regular oil with some of this oil as needed for a slow oil leak?

I have a beater that i use for grocery shopping and Dr appts. It burns oil possibly worn valve guide seals. A friend told me to use synthetic or high mileage and it should help a little. Since i burn about a quart a month ive used everything from this to little known brands. My car still runs fine, passes inspection, no check engine. Oh by the way using a synthetic or a high mileage did cut down on oil consumption.

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Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil, 1 Quart, Pack of 6

Product ID: 2526360

Details

Brand
Castrol
Liquid Volume
6 Quarts
Package Information
Bottle
SAE J300 Viscosity Grade
5W-30
Vehicle Service Type
For use in 75

⛽Improved Fuel Economy

🛡️Engine Wear Protection

🛢️5W-30 Synthetic Blend

€ 133.86

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Description

🛢️ Keep your high-mileage ride running like new — because every mile counts!

LEAK REDUCER - Advanced seal conditioners help minimize leaks, keeping your engine tight and efficient.
SLUDGE FIGHTER - Superior dispersancy formula actively combats sludge buildup for a cleaner engine.
ENGINE LONGEVITY BOOSTER - Phosphorus Replacement Technology extends emission system life and protects catalytic converters.
FUEL EFFICIENCY ENHANCER - Formulated to improve fuel economy, saving you money on every mile.
TRUSTED HIGH MILEAGE FORMULA - Specifically designed for vehicles with over 75,000 miles to maintain peak performance.

Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil is engineered for vehicles with over 75,000 miles, combining advanced additives and Phosphorus Replacement Technology to protect engine components, reduce leaks, fight sludge, and improve fuel economy. This 6-quart pack meets or exceeds top industry standards, ensuring superior performance and extended engine life.

Specifications

ASIN	B008BOG0PG
Automotive Fit Type	Universal Fit
Best Sellers Rank	#213 in Automotive ( See Top 100 in Automotive ) #4 in Motor Oils
Brand Name	Castrol
Compatible with Vehicle Type	For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (8,479)
Global Trade Identification Number	00079191064405
Included Components	Motor Oil
Item Type Name	Motor Oil
Liquid Volume	6 Quarts
Manufacturer	Castrol
Manufacturer Part Number	06440
Manufacturer Warranty Description	12 Months
Model Number	06440
SAE J300 Viscosity Grade	5W-30
Size	1 Quart, Pack of 6
UPC	079191064405
Unit Count	192.0 Fluid Ounces
Viscosity Level	Low to Medium

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€ 133.86

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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