That's a real oil. thought I was a thickie using 10W30
Was wondering where 25W60 is used and also forgot that 25W was a SAE grade so it got me even more curious to do a little research ... Saw some avionics references. However Mobil and Castrol market it for cars.
Castrol "intelligent" molecules fight "cholesterol" as well. lol
Curious about api sn! What kind of resource conserving does 25W60 offer? Your engine?
I think I may move back to 10W40 like old days or maybe even 0W40.
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GTX High Mileage 25W-60
GTX High Mileage 25W-60 Superior protection against deposits for automobiles over 100,000 kms
Description
Castrol GTX High Mileage 25W-60 is one of the leading Premium oils for engines over 100,000 kilometers. Its advanced formula uses modern technology in a Castrol exclusive additive that brings superior protection against harmful engine deposit build up that acts as "cholesterol" in your engine. Castrol GTX High Mileage 25W-60 allows free flow of oil throughout the crtiical engine parts.
Application
Exceeds the requirements for gasoline and gas (LPG, CNG, GNV), fueled automobiles including those with turbo, multiple valve and catalytic converters where API SN, SM, SL or SJ is recommended.
Advantages
Its exclusive additive offers superior detegency that helps fight and prevent harmful deposit build-up offering 40% greater protection than the most stringent API industry standard*
Utilizes special base oils to provide superior protection against oil burn-off associated with 100,000 plus kilometer engines compared to leading oils**
Helps prevent deterioration of engine seals resulting in less oil consumption which helps extend the life of the engine.
Helps prevent wear
* As measured in VG sludge test
** As measured in NOACK laboratory volatility test
Product Performance Claims API SN
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Mobil:
Product Description
Mobil Special Alto Kilometraje is a unique formula that is especially designed for engines with over 100,000 kilometers. The 25W-60 viscosity provides a thick oil film that helps protect gasoline engines that operate in severe service such as high temperatures and in city traffic where stop-and-go driving is common. Mobil Special Alto Kilometraje is formulated from quality base stocks combined with performance additives, which help protect against the formation of sludge and corrosion.
Features and Benefits
Mobil Special Alto Kilometraje:
• Helps to reduce engine wear and corrosion in higher mileage vehicles
• Protects under a wide variety of operating conditions, especially high temperatures
• Helps reduce oil leakage due to the thick oil film
• Reduce oil consumption
Mobil Special Alto Kilometraje is recommended by ExxonMobil for higher mileage vehicles including turbo charged, super charged, fuel injected, multi-valve and normally aspirated engines. Before using Mobil Special Alto Kilometraje, consult the owner's manual of the vehicle for the manufacturer's recommended viscosity grade and API Service Classification.