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FAQs for Mobil 1™
What makes Mobil 1 superior to our conventional motor oil?
Is it okay to mix conventional motor oil with Mobil 1?
Will the use of Mobil 1 void my new-car warranty?
Is it true that new engines need break-in periods using conventional motor oil?
Should I follow the "severe" service oil change intervals mentioned in my owner's manual? Does Mobil 1 offer specific benefits under these conditions?
How often should I change the oil if I'm using Mobil 1?
Can I use an oil supplement and/or engine treatment with Mobil 1?
Can Mobil 1 be used in lawn mowers, snow blowers, and other small-cylinder engines?
I like to change the oil myself. How should I dispose of Mobil 1?
I thought Mobil 1, as a full synthetic, already provided the protection my high-mileage car needs. Do I really need to switch off Mobil 1 to your High Mileage product for my high-mileage car?
I'm currently using Mobil Super High Mileage with good results. Why should I change to Mobil 1 High Mileage 10W-30, which costs more?
What is Mobil 1 Advanced Fuel Economy?
Why should I consider using Mobil 1 Advanced Fuel Economy?
How much can I save with Mobil 1 Advanced Fuel Economy?
How can I determine the fuel savings that I might experience with my vehicle?
When you say that I can experience up to two percent fuel economy improvement, is that compared to other synthetic motor oils, or conventional motor oils?
What if I don't notice improved fuel economy after switching to Mobil 1 0W-20 Advanced Fuel Economy or Mobil 1 0W-30 Advanced Fuel Economy?
How is it possible for these products to improve fuel economy? What makes these formulations unique?
Where can I buy Mobil 1 Advanced Fuel Economy?
How much does Mobil 1 Advanced Fuel Economy cost?
What viscosities of Mobil 1 Advanced Fuel Economy are available, and can I use them in my vehicle?
Why do you recommend Mobil 1 0W-20 Advanced Fuel Economy as an alternative to 5W-20 when my car manufacturer recommends 5W-20?
If the manufacturer of my car recommends a 5W-20 motor oil, will I void my warranty if I use Mobil 1 0W-20 Advanced Fuel Economy instead?
Why do you recommend 0W-30 as an alternative to 10W-30 when my car manufacturer recommends 10W-30?
If the maker of my car recommends I use 10W-30 motor oil, will I void my warranty if I use 0W-30 instead?
What makes Mobil 1 superior to our conventional motor oil?
First of all, the performance of Mobil 1 is more robust, especially in terms of low-temperature pumping and flow. High-temperature stability leading to the protection against deposits is also superior. These attributes translate into less engine wear, to help keep your engine running like new, and a long engine life. Conventional oils lack the performance of synthetic motor oils in the areas of low-temperature performance and high-temperature oxidation stability. Mineral base stocks used in conventional motor oils also contain significantly more impurities, such as aromatics and other undesirable contaminants that cannot be completely removed by conventional refining of crude oil.
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Is it okay to mix conventional motor oil with Mobil 1?
Yes. Mobil 1 is fully compatible with conventional motor oils, semi-synthetic motor oils, and other synthetic motor oils, should it be necessary to mix them. But the superior performance of Mobil 1 will be reduced by diluting it.
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Will the use of Mobil 1 void my new-car warranty?
With the exception of the Mazda rotary engine (Mazda does not recommend any synthetic oils), Mobil 1 will not void new-car warranties where an API certified oil is recommended. Mobil 1 meets or exceeds API (American Petroleum Institute) and ILSAC (International Lubricant Standardization and Approval Committee) motor oil service requirements of all new-car manufacturers, both import and domestic. If in doubt, always check your vehicle owner's manual or contact the vehicle manufacturer.
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Is it true that new engines need break-in periods using conventional motor oil?
That is a myth. In the past, engine break-in was necessary to remove metal flashing or any other abrasive material left inside the engine after machining, as well as to allow the valves and rings to "seat" properly. Today's engines are built with much tighter tolerances, much improved machining, and under much cleaner conditions compared to the engines of 10 or 20 years ago. Current engine manufacturing technology does not require a break-in period using petroleum-based motor oils.
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Should I follow the "severe" service oil change intervals mentioned in my owner's manual? Does Mobil 1 offer specific benefits under these conditions?
Many kinds of driving conditions qualify your vehicle for severe service oil change intervals, and Mobil 1 is ideal for this service. Severe service conditions can include, among other things:
  • Trips of less than 10 miles
  • Driving in cold weather
  • Idling for extended periods
  • Stop-and-go traffic
  • Pulling trailers/carrying heavy loads
  • Driving in dusty conditions
Under both normal and severe service conditions, Mobil 1 is engineered to provide performance reserves in the areas of sludge prevention, piston cleanliness, wear protection, and high-temperature durability.
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How often should I change the oil if I'm using Mobil 1?
Oil change intervals can be as short as 3,000 miles or as long as 15,000 miles on some new cars. We recommend that you follow the oil and filter change frequencies shown in your owner's manual, especially during the warranty period. With Mobil 1's high-performance reserves, you can have the confidence to go the full mileage or time frame recommended by the vehicle manufacturer. Mobil 1 is especially suitable for the latest vehicles with extended drain intervals or vehicles with oil monitoring systems that vary oil drain intervals.
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Can I use an oil supplement and/or engine treatment with Mobil 1?
ExxonMobil does not recommend it. According to the API (American Petroleum Institute) and Alliance of Automobile Manufacturers (AAM), "certified oils eliminate the need for supplemental engine oil additives." In fact, the use of any oil supplement is not recommended by car manufacturers and may void a warranty.
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Can Mobil 1 be used in lawn mowers, snow blowers, and other small-cylinder engines?
Yes, if the small engines are four-cycle engines that call for detergent-type motor oil. This type of engine has a separate crankcase for motor oil – it's not mixed with gasoline.
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I like to change the oil myself. How should I dispose of Mobil 1?
You should follow the same environmentally sound procedures that you do with conventional motor oil. The U.S. Environmental Protection Agency's (EPA) guidelines for disposal include:
  • Do not dump used motor oil in the trash.
  • Do not pour it on the ground or down the sewer or storm drain.
  • Place the used motor oil in a closed container.
  • Take it to a service station or a collection location that recycles used motor oil.
  • Do not burn the used motor oil in a space heater.
  • To make it easier to recycle, do not mix motor oil with other substances, such as gasoline or antifreeze.
Locate proper disposal locations in your area. Many Exxon and Mobil service stations will take used motor oil from do-it-yourselfers and will follow EPA-approved recycling practices. Please note that it is acceptable to mix used Mobil 1 with used conventional oil. In short, Mobil 1 should be disposed of in the same manner as used conventional motor oil.
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I thought Mobil 1, as a full synthetic, already provided the protection my high-mileage car needs. Do I really need to switch off Mobil 1 to your High Mileage product for my high-mileage car?
Mobil 1 High Mileage is designed for high-mileage vehicles that have been using conventional motor oils. It's true that most Mobil 1 vehicles with 75,000 plus miles should be in excellent condition and would not require some of the Mobil 1 High Mileage benefits. However, most cars on the road today do not use synthetic oils, so we developed this oil specifically for these cars that would benefit from switching off conventional oil.
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I'm currently using Mobil Super High Mileage with good results. Why should I change to Mobil 1 High Mileage 10W-30, which costs more?
If your vehicle has been maintained well, Mobil Super High Mileage represents an excellent choice. However, if you believe your engine may have sludge through less-than-adequate maintenance practices, Mobil 1 High Mileage may be the more suitable selection. Mobil 1 High Mileage helps reduce the sludge that other oils can leave behind which can result in extended engine life. For severe cases where sludge and other heavy deposits are present, shorter oil change intervals of 3,000 miles are recommended as clean-up proceeds.
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What is Mobil 1 Advanced Fuel Economy?
Mobil 1 Advanced Fuel Economy synthetic motor oils are fully synthetic motor oils engineered to deliver outstanding engine protection and provide improved fuel economy. The low-friction formulations increase engine efficiency and fuel economy versus those viscosity grades most commonly used. Mobil 1 Advanced Fuel Economy oils outperform conventional oils and meet or exceed the latest industry standards.
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Why should I consider using Mobil 1 Advanced Fuel Economy?
Mobil 1 Advanced Fuel Economy 0W-20 and 0W-30 motor oils flow faster than 5W-20 and 5W-30 motor oil, respectively, reaching your engine's vital parts faster during start-up. Not only does this help reduce wear on engine parts, but it also reduces the demands on your starter and battery. It's worth noting that GM owner's manuals recommend using synthetic 0W-30 or 5W-30 for temperatures below -20F. Mobil 1 0W-20 and 0W-30 are certified as "Resource Conserving" by both the International Lubricant Standardization and Approval Committee (ILSAC) and the American Petroleum Institute (API).
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How much can I save with Mobil 1 Advanced Fuel Economy?
Mobil 1 Advanced Fuel Economy synthetic motor oils deliver up to two percent fuel economy improvement* and can save drivers more than $400 on gasoline over the life of their vehicles. That's a savings of about six cents per gallon of fuel. A typical passenger car with a 20-gallon gas tank can go up to nine more miles on a tank of gas when using Mobil 1 Advanced Fuel Economy. That equates to up to 250 more miles per year under typical conditions.

*Fuel economy improvement is based on a comparison versus those viscosity grades most commonly used and a potential two percent fuel economy improvement. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity. Savings estimates are based on a gasoline cost of $3 per gallon, average fuel economy of 22.5 miles per gallon, annual mileage of 12,500 and lifetime mileage of 150,000.
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How can I determine the fuel savings that I might experience with my vehicle?
We offer an online fuel savings calculator. All you need to do is plug in the current cost of fuel, your gas tank size, the average miles per gallon you experience with your vehicle and the number of miles you drive per year.  It's that simple. Many drivers can experience savings* on gasoline purchases over the life of their vehicles.

*Comparison based upon two percent potential fuel economy improvement obtained by switching from higher viscosity oils to a 0W-20 or 0W-30 grade. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity.
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When you say that I can experience up to two percent fuel economy improvement, is that compared to other synthetic motor oils, or conventional motor oils?
A potential two percent fuel economy improvement is obtained by switching from higher viscosity oils, conventional or synthetic, to a 0W-20 or 0W-30 grade. Actual savings are dependent upon vehicle/engine type, outside temperature, driving conditions and your current engine oil viscosity. The higher your current viscosity equates to a greater potential for savings.
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What if I don't notice improved fuel economy after switching to Mobil 1 0W-20 Advanced Fuel Economy or Mobil 1 0W-30 Advanced Fuel Economy?
Industry data confirms that lower viscosity motor oils, like the 0W-20 and 0W-30 viscosity grades offered as part of the Mobil 1 Advanced Fuel Economy line, contribute to improved fuel economy over the life of the vehicle. However, fuel economy improvement can be influenced by many factors including: your vehicle/engine type, outside temperature, driving conditions, adjusting tire pressure and your current engine oil viscosity.
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How is it possible for these products to improve fuel economy? What makes these formulations unique?
Mobil 1 Advanced Fuel Economy motor oils are low viscosity oils that offer low friction, fully synthetic formulations that increase engine efficiency and deliver outstanding fuel economy.
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Where can I buy Mobil 1 Advanced Fuel Economy?
Mobil 1 Advanced Fuel Economy is available in leading retailers and auto parts stores including Wal-Mart, AutoZone, Advance Auto Parts, Checker, Schucks and Kragen. Use our Product Locator to find a store near you.
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How much does Mobil 1 Advanced Fuel Economy cost?
While pricing is determined by retailers, we anticipate that Mobil 1 0W-20 Advanced Fuel Economy and Mobil 1 0W-30 Advanced Fuel Economy will be priced comparably with other Mobil 1 engine oil viscosities.
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What viscosities of Mobil 1 Advanced Fuel Economy are available, and can I use them in my vehicle?
Mobil 1 Advanced Fuel Economy is available in 0W-20 and 0W-30 formulations. ExxonMobil recommends Mobil 1 0W-20 for 5W-20 applications and Mobil 1 0W-30 for 5W-30 and 10W-30 applications.
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Why do you recommend Mobil 1 0W-20 Advanced Fuel Economy as an alternative to 5W-20 when my car manufacturer recommends 5W-20?
Mobil 1 0W-20 Advanced Fuel Economy meets or exceeds many new car warranty requirements where SAE 0W-20 or 5W-20 oil is recommended. Mobil 1 0W-20 Advanced Fuel Economy provides the high temperature protection of 5W-20 oils while offering improved fuel economy. As a result, many consumers can benefit from improved fuel economy while also obtaining outstanding engine protection for their vehicle. Mobil 1 0W-20 Advanced Fuel Economy should only be used in vehicles designed to operate on either 0W-20 or 5W-20 motor oil.
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If the manufacturer of my car recommends a 5W-20 motor oil, will I void my warranty if I use Mobil 1 0W-20 Advanced Fuel Economy instead?
If your car manufacturer recommends a SAE 5W-20 ILSAC oil (starburst), we recommend either Mobil 1 5W-20 or Mobil 1 0W-20 Advanced Fuel Economy. Mobil 1 0W-20 Advanced Fuel Economy will not void new-car warranties where an SAE 5W-20 oil is recommended. Mobil 1 0W-20 Advanced Fuel Economy can provide better fuel economy and better low temperature performance compared to higher viscosity oils.
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Why do you recommend 0W-30 as an alternative to 10W-30 when my car manufacturer recommends 10W-30?
Mobil 1 0W-30 Advanced Fuel Economy meets or exceeds many new car warranty requirements where SAE 0W-30, 5W-30 or 10W-30 oil is recommended. Mobil 1 Advanced Fuel Economy 0W-30 provides the high temperature protection of 5W-30 and 10W-30 oils while offering improved fuel economy. As a result, many consumers can benefit from improved fuel economy while also obtaining outstanding engine protection for their vehicles.
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If the maker of my car recommends I use 10W-30 motor oil, will I void my warranty if I use 0W-30 instead?
If your car maker recommends SAE 10W-30 ILSAC oil (starburst), we recommend either Mobil 1 10W-30, Mobil 1 5W-30, or Mobil 1 0W-30 Advanced Fuel Economy, which offers the high temperature protection of 10W-30 or 5W-30 oils while offering improved fuel economy. You will not void your warranty where an API certified oil is recommended.
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