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

LEAK DEFENDER - Advanced seal conditioners reduce leaks, saving you from costly repairs and messy surprises.
SLUDGE FIGHTER - Superior dispersancy formula actively combats sludge buildup, keeping your engine pristine mile after mile.
HIGH MILEAGE HERO - Specifically engineered for vehicles over 75,000 miles, ensuring peak performance well into your car’s golden years.
FUEL ECONOMY ENHANCER - Optimized additives improve fuel efficiency, putting more miles in your tank and money back in your pocket.
ENGINE LONGEVITY BOOSTER - Phosphorus Replacement Technology safeguards your emission system for a cleaner, longer-lasting engine.

Castrol GTX High Mileage 10W-40 Synthetic Blend Motor Oil is expertly formulated for vehicles with over 75,000 miles, combining advanced phosphorus replacement technology, superior sludge-fighting dispersants, and seal conditioners to extend engine life, reduce leaks, and improve fuel economy. Packaged in a convenient 5-quart size, it meets and exceeds industry standards for oil burn-off protection, making it the smart choice for maintaining your car’s performance and longevity.

Reviews

H**D

Would buy again!

Best motor oil you can get. Great price also! 5 stars!

7.08.2025

Y**L

Original

Exelente product

10.09.2025

P**T

Buy it!

Why did you pick this product vs others?:Best oil ever.I use it in all gas engines and zero complaints fir 50+ years

26.06.2025

1**N

My favorite oil

I've been using this oil forever and it always holds up without any sludge. Luckily the price is still affordable. I can't believe the auto parts stores won't $35 for a jug of this.

25.08.2025

S**E

Impressive quality for the price. Definitely five stars.

10.09.2025

D**N

Great for older engines.

Full synthetic oil tends to run low after a few months on older engines. Also, as an engine ages, the 5w20 also becomes a little too thin, causing it to also run low. So.... I've found that running 10w30 synthetic blend lubricates my 300,000 mile engine just fine without having to add the extra quart between changes. I prefer motorcraft, but it no longer comes in 5 qt bottles, so here we are. It works great for older engines that use a little oil (with 5w20 synthetic).

6.02.2025

M**T

Producto muy recomendable

Excelente

13.07.2025

C**C

Excellent oil for the price!!

28.08.2025

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Viscosity	10W-40 sae_grade
Brand	Castrol
Vehicle Service Type	For use in vehicles with over 75,000 miles, Passenger cars, trucks, and SUVs
UPC	079191231111
Automotive Fit Type	Universal Fit
Global Trade Identification Number	00079191231111
Manufacturer	Castrol
Size	5 Quarts
SAE J300 Viscosity Grade	10W-40
Model	03111
Item Weight	0.01 ounces
Product Dimensions	8.31 x 4.56 x 12.75 inches
Item model number	1597C2
Manufacturer Part Number	03111C

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

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