Is this oil used for inboard Mercruiser?

Castrol does not recommend using passenger car engine oils like Castrol GTX High Mileage 10W-30 in marine applications. At this time, Castrol does NOT offer 4-stroke marine oil or NMMA certified engine oil therefore Castrol GTX High Mileage 10W-30 would NOT be recommended for use in a Mercruiser Inboard.

Can I use this oil in my zero turn mower john deere says 10W-30

This is a blended half synthetic, if your engine requires 10W 30 this will work. The purely synthetic oil is very thin and can find a leak in machinery very quickly. This in my 95 YJ has performed well.

Castrol motor oil is quality without question. I have several cars some oil and some new . I use it in all of them. The high mileage oil truly helps the cars with high mileage.

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Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil, 5 Quarts

Product ID: 5995797

Details

Brand
Castrol
Liquid Volume
160 Fluid
Package Information
Bottle
SAE J300 Viscosity Grade
10W-30
Vehicle Service Type
For use in 75

🔥Exceptional oil burn-off protection

⚙️Phosphorus Replacement Tech for emission system

🛢️5 Quarts synthetic blend volume

Description

🛠️ Keep your high-mileage ride running like new — because your journey deserves premium care!

FUEL ECONOMY ENHANCER - Improved fuel economy compared to industry standards, saving you money on every mile.
EMISSION SYSTEM GUARDIAN - Phosphorus Replacement Technology protects catalytic converters and extends emission system life.
ENGINE LONGEVITY BOOSTER - Specially formulated for vehicles with 75,000+ miles to extend engine life and reduce wear.
SLUDGE CORROSION FIGHTER - Superior dispersancy combats sludge buildup and prevents corrosion in critical engine areas.
LEAK REDUCING SEAL CONDITIONERS - Advanced additives help reduce leaks, keeping your engine cleaner and more efficient.

Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil is engineered for vehicles with over 75,000 miles, combining advanced Phosphorus Replacement Technology and superior dispersants to protect your engine from wear, sludge, and leaks while enhancing fuel economy and extending emission system life.

Specifications

ASIN	B00GSX43WE
Automotive Fit Type	Universal Fit
Best Sellers Rank	#907 in Automotive ( See Top 100 in Automotive ) #21 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 (3,437)
Global Trade Identification Number	00079191231104
Included Components	Motor Oil
Item Type Name	Motor Oil
Liquid Volume	160 Fluid Ounces
Manufacturer	Castrol
Manufacturer Part Number	03110C
Manufacturer Warranty Description	12 Months
Model Number	03110
SAE J300 Viscosity Grade	10W-30
Size	5 Quarts
UPC	079191231104
Unit Count	160.0 Fluid Ounces
Viscosity Level	Medium to High

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