I can change the convencional motor oil for sinteric motor oil in many next service

Sure, should pose Zero problems, just use the manufacturer recommended grade of oil.

whats the percentage of synthetic oil in this oil?

We never divulge amounts of components in our products but we would not call a product a synthetic blend without it having a performance benefit as compared to our conventional product.

Generally i use highmileage 5w-30 for my nissan sentra 2007 which has 200k miles, shall i use highmileage 10w-40 now?

Look what Nissan says on weight to use and stick with it. It is designed to use the weight as for the clearances on you motor. Once you used the high mileage continue to use it. The high mileage has stuff in the oil to expand some of the seal and gaskets in your motor. Now if you go back the seals may shrink back and start to leak. Go to youtube and look for the video on different filters and oils. ie fram. I had a someone tell me to get the fram off my 92 ford 5.0 mustang and watching the video on filter I could see why. Oil is important but especially the filter.

Can you use it in a 212 predator

Contact Predator to see if that oil is compatible with your boat.

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🚗 Drive smarter, last longer — Castrol GTX High Mileage keeps your engine young!

FUEL ECONOMY ENHANCER - Optimized synthetic blend improves fuel efficiency, saving you money on every drive.
WEAR RESISTANT FORMULA - Enhanced additives actively prevent engine wear, ensuring smoother rides mile after mile.
SLUDGE FREE PERFORMANCE - Advanced dispersion formula prevents sludge buildup, keeping your engine cleaner, longer.
ENGINE LONGEVITY BOOSTER - Phosphor exchange technology safeguards your catalytic converter, extending exhaust system life.
LEAK REDUCING SEAL CONDITIONER - Special additives condition seals to minimize leaks and maintain peak engine efficiency.

Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil is engineered with advanced phosphor exchange technology and superior burnoff protection to extend engine and exhaust system life. Its unique formula prevents sludge buildup, reduces leaks with seal conditioners, and improves fuel economy, making it the #1 choice for high mileage vehicles.

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Manufacturer	Castrol
Brand	Castrol
Model	03111
Product Dimensions	21.11 x 11.58 x 32.39 cm; 0.28 g
Item model number	1597C2
Item Dimensions L x W x H	21.1 x 11.6 x 32.4 cm
Viscosity	10W-40
Color	orange (amber)
Item Weight	0.28 g

Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quart

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