Castrol GTX High mileage is a synthetic blend motor oil which is most suitable for car or vehicles having high mileage engines and using gasoline and diesel. Unlike other industrial motor oils, it is known for being formulated with phosphorus replacement technology which helps extend your engine and emission system’s life.
Valvoline Maxlife High mileage motor oil uses the synthetic blend formula. It is most suitable for gasoline and diesel engines having high mileage. This motor oil is formulated with Maxlife technology and special anti wear additives which promote 40% better engine wear protection compared to other industrial oils.
Compare Valvoline with Pennzoil Full Synthetic Oil
The following is a detailed comparison between Castrol GTX High Mileage and Valvoline Maxlife High mileage motor oils.
| Specs | Castrol GTX High Mileage | Valvoline MaxLife High Mileage |
| Oil Type | Synthetic blend | Synthetic blend |
| Engine Type | Gasoline/ Diesel | Gasoline/Petrol/ Diesel |
| Available viscosity grades | 5W-20, 5W-30, 10W-30, 10W-40, 20W-50, and 25W-60. | SAE 0W-20, SAE 5W-20, SAE 5W-30, SAE 10W-30 SAE 10W-40 SAE 20W-50 |
| ILSAC | GF-5 and GF-6 | GF-6 |
| API | API SN/SP, API SN Plus | API SP |
| Cost | $19.32 for 5 quartz | $17.47 for 5 quartz |
| Oil change frequency | 10,000- 15,000 | 5, 000-7,000 |
| Additives | Phosphorous replacement technology, anti oxidants, detergents, seal conditioners, viscosity index improvers, anti wear agents. | Maxlife technology, special anti wear agents, anti oxidants, rust and corrosion inhibitors, friction fighting agents premium seal conditioners, detergents and viscosity index improvers. |
Table of Contents
Oil Type Comparison
The oil type tells you about the qualities possessed by a motor oil. Luckily both Castrol GTX high mileage and Valvoline MaxLife high mileage are both high mileage and synthetic motor oils.
Castrol GTX high mileage is a synthetic blend motor oil which makes it a mixture of both full synthetic and mineral oil. Synthetic blend oils are known to give out better performance and protection. Moreover, this motor oil limits the amount of phosphorus in it which helps give it maximum engine protection.
Valovoline MaxLife high mileage is also a synthetic blend motor oil which makes it better than any conventional motor oil as it has the characteristics of both a synthetic and a natural mineral oil. It is also more cost effective than conventional oils. It uses special technology which particularly focuses on the needs of high mileage engines.
Comparing Additives:
Engine oils are formulated with innovative technology and additives which help boost performance and reduce any wear or tear.
Castrol GTX High mileage uses the phosphorous replacement technology. Moreover, it has special additives added in it which are anti wear agents, anti oxidants, seal conditioners, viscosity index improvers, and cleaning detergents which help maintain the oil quality.
Valvoline MaxLife high mileage motor oil uses its innovative MaxLife technology which helps maintain performance for high mileage engines. A couple of additives are further added in the motor oil such as detergents, rust and corrosion inhibitors, viscosity index improvers, anti wear agents, friction fighting agents and anti oxidants.
Engine Performance Comparison
- Catalytic converter performance
When your engine runs, oil particles turn into small vapors which can easily enter the car’s emission system. This in turn can produce poisonous by products like phosphorous which can damage the catalytic converter. Sometimes, an engine may misfire which also leads to catalytic converter failure as it causes incomplete combustion and causes overheating.
Castrol GTX High mileage motor oil uses advanced Phosphorous replacement technology which specifically focuses on minimizing the use of phosphorous so that the catalytic converter and emission system stay protected. It also uses special additives which help reduce the risk of emission system failure.
Valvoline MaxLife High mileage motor oil uses MaxLife technology which makes sure every important engine part is well lubricated and protected. This helps boost performance and provide a longer engine life. The superior anti oxidants further help stop any oil molecules from turning into vapor and entering the emission system.
- Reduction of Sludge built
Sludge is a sticky thick substance which damages your engine as it reduces the oil pressure and blocks the valve which in turn stops oil circulation. Sludge is basically formed when oxidation takes place and the engine oil comes in contact with oxygen when the engine stays heated for long intervals. The oil particles then break down and combine with dirt to form carbon and in the presence of gas, coolant and water, sludge is formed.
Castrol GTX High Mileage is known to have superior discrepancy that helps prevent any sludge built up. The special detergents in this motor oil promote cleanliness and maintain the quality of the engine oil along with eliminating any formation of sludge or harmful substances.
Valvoline MaxLife High Mileage is formulated with additives such as detergents which help keep the engine clean and free from any sludge deposits. Moreover, the rust and corrosion inhibitors further help prevent any rust and corrosion on engine surfaces.
- Oil burn-off protection
When engine stay heated for long, oil molecules easy evaporate which causes the oil level to drop. This means there will be less oil left in the engine and you will have to change it before time. Thus, increased oil burn off can lead to increased fuel consumption. This issue can further leave the engine unprotected and produce dangerous emissions which increase sludge deposits, causes poor low temperature start and performance loss.
Castrol GTX High mileage motor oil is known to provide exceptional oil burn off protection which exceeds the industry’s standard. The special anti oxidants in this motor oil stop any oil molecules from evaporating and thus maintain the oil level.
Valvoline MaxLife High mileage uses advanced technology and additives to prevent oil burn off. The superior anti oxidants present in this motor oil resist any engine oil break down by preventing any oil burn off even under extreme temperature conditions.
- Minimizing Engine Wear off
Special anti wear additives along with unique technology are present in engine oils which help prevent any engine wear or tear.
Castrol GTX High mileage is formulated with phosphorous replacement technology which helps replace phosphorous with special additives which help maintain engine wear protection. The anti wear additives in this motor oil also help minimize any engine wear and thus keep it protected.
Valvoline Maxlife High mileage has unique anti wear additives which help combat any engine wear or tear. This is why this motor oil is known to perform 40% better than any industrial oil when it comes to providing good wear protection. Moreover, the advanced friction fighting agents present in this motor oil also help reduce any engine wear due to friction between the metal surfaces.
- Engine seals protection
Advanced technology and special additives such as detergents are used to help protect the engine seal.
Castrol GTX High mileage has premium seal conditioners which help protect the engine seal and reduce any leaks. Moreover, the detergents in this motor oil further help clean out any harmful substances or sludge deposits which could damage the engine seal.
Valvoline MaxLife high mileage motor oil also has advanced conditioning seals which help revitalize aging seals that may cause leaks. Moreover, additional detergents also help keep the inside of the engine super clean and free from harmful deposits.
- Improved Fuel Economy
If your engine is in good health and works properly then you can majorly reduce its fuel consumption. Furthermore, the reduction of sludge built up and oil burn off protection also help lower the fuel consumption on a significant level.
Castrol GTX High mileage has improved fuel economy as it uses special additives. Detergents help keep the oil free from any sludge built up and anti oxidants help reduce any oil evaporation so that the oil level is maintain and the fuel consumption is lowered.
Valvoline MaxLife high mileage uses advanced technology which helps prevent any thermal breakdown under extreme temperatures. The anti oxidants help prevent the oil molecules from evaporating and thus control the fuel consumption. The detergents and rust and corrosion inhibitors further help prevent any harmful substances and sludge from building up.
Viscosity Comparison:
Engine oils are available in a variety of different viscosities and grades which helps define if they are better suitable for lower or higher temperatures.
Castrol GTX High mileage is available in 6 different viscosities which are 5W-20, 5W-30, 10W-30, 10W-40, 20W-50, and 25W-60. According to the SAE standard this motor oil is suitable for both lower and normal temperatures. Here for example, the digits 5, 10 and 20 represent the grade at low temperature with W indicating winters. The digits 30, 40 and 550 indicate the grade at normal temperature. The engine oil gets thin during start up as the engine is cold but gets thick once the engine is heated so that the oil is not consumed too quickly. the viscosity index improvers help maintain the performance are different temperatures. This motor oil meets and exceeds API standard and ILSAC GF-5/GF-6.
Valvoline MaxLife High mileage is available in 4 different viscosities which are 5W-30, 5W-40, 10W-40, and 15W-40. According to the SAE standard this motor oil works under both lower and normal temperatures. The digits 5, 10 and 15 indicate the grade at low temperature with W indicating winters whereas the digits 30 and 40 indicate the grade at normal temperature. The high quality viscosity index modifiers further help prevent any thermal breakdown under extreme temperatures. Valvoline MaxLife meets and exceeds the API standard and ILSAC GF-6 standard.
Oil change Frequency Comparison:
An engine oil that works well and gives you high mileage before it requires to be changed is a blessing!
Castrol GTX High mileage motor oil has a good oil change interval time. It gives you about 10,000 to 15,000 miles before it requires to be changed.
Valvoline MaxLife High mileage motor oil is specially formulated with MaxLife technology for high mileage engines which helps protect engine run over 75,000 miles. However, it is recommended to change this motor oil after every 5,000 to 7,000 miles.
Cost Comparison:
Synthetic blend motor oils have the benefit of being cost effective along with having the top qualities of full synthetic and natural mineral oils.
Castrol GTX High mileage uses phosphorous replacement technology along with modern additives which help boost performance and maintain the oil quality but still costs you pretty less. The price of this motor oil is $19.32 for 5 quartz.
Valvoline Maxlife high mileage also uses MaxLife technology for high mileage engines along with special additives and nevertheless is reasonably priced. This motor oil costs you about $17.47 for 5 quartz.
Conclusion:
Well, you would not have to worry about choosing between having a full refined synthetic oil or a naturally derived budget friendly mineral oil as you would get the benefits of both. Both these motor oils are synthetic and give you high mileage.
However, Castrol GTX high mileage provides you more mileage compared to Valvoline Maxlife high mileage. On the other hand, Valvoline Maxlife high mileage costs you a bit lesser than Castrol GTX high mileage.
Nevertheless, both these high mileage engine oils work great and give longer lasting performance.