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

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

4.8/5

Product ID: 5995797

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Details

Viscosity
10W 30
Brand
Castrol
Vehicle Service Type
For use in 75
UPC
079191231104
Automotive Fit Type
Universal Fit

🔥Exceptional Oil Burn-Off Protection

⚙️Phosphorus Replacement Tech for Emission System Longevity

🛢️10W-30 Synthetic Blend Viscosity

Description

🚗 Drive smarter, last longer — the high-mileage oil your engine deserves!

LEAK DEFENDER - Advanced seal conditioners reduce leaks, saving you from costly repairs and messy surprises.
SLUDGE FIGHTER - Superior dispersancy formula actively combats sludge buildup, ensuring peak engine performance mile after mile.
FUEL ECONOMY ENHANCER - Formulated to improve fuel efficiency, helping you go further on every tank—because every drop counts.
ENGINE LONGEVITY BOOSTER - Phosphorus Replacement Technology extends emission system life, keeping your ride cleaner and greener.
INDUSTRY LEADING PROTECTION - Exceeds API SP/SN PLUS and ILSAC GF-6 standards for unmatched wear prevention and engine care.

Castrol GTX High Mileage 10W-30 Synthetic Blend Motor Oil is engineered for vehicles with over 75,000 miles, combining advanced additives and phosphorus replacement technology to reduce engine wear, prevent leaks, fight sludge, and improve fuel economy. This 5-quart oil meets or exceeds top industry standards (API SP/SN PLUS, ILSAC GF-6), delivering superior protection and performance for passenger cars, trucks, and SUVs.

Specifications

Viscosity	10W 30 sae_grade
Brand	Castrol
Vehicle Service Type	For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs
UPC	079191231104
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00079191231104
Manufacturer	Castrol
Size	5 Quarts
Model	03110
Item Weight	9.43 pounds
Product Dimensions	11.9 x 9.5 x 4.5 inches
Item model number	03110
Is Discontinued By Manufacturer	No
Manufacturer Part Number	03110C

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

Details

Description

Specifications

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