How long can you run high mileage oil?

The higher-mileage oils are formulated with seal conditioners that increase flexibility and restore shape, which can help prevent leaks in the long run. The bottom line is that high-mileage engine oils are designed for engines that are beyond their warranties and have 60-, 80-, 150,000 miles.
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Can high mileage oil damage an engine?

High-mileage motor oil doesn't hurt and it could prevent leaks from starting. Most vehicle manufacturers would say it's normal for an engine to consume some oil between oil changes.
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What happens if you use high mileage oil?

Reduced oil consumption: High mileage vehicles tend to leak and burn off more oil than younger cars due to degraded engine seals. High mileage oil rejuvenates degraded seals, which leads to less oil consumption and burnoff. Less engine sludge: Older engines tend to accumulate sludge left behind by other motor oils.
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How often should high mileage oil be changed?

You may be wondering “how often should I change my oil if my car has high mileage”? If you have a newer car with 150,000 or 200,000 miles you likely should also change your oil every 3,000 miles. If you burn more than 1 quart of oil or your oil is very dark before you get to 3,000 miles it's likely time to change it!
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Should I use high mileage engine oil?

Importantly, high mileage oil helps prevent aging seals and gaskets from becoming brittle and causing leaks, which are usually evidenced by oil stains on the pavement where the car is parked. This can lead to increased oil consumption and even costly engine damage.
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DO NOT USE High Mileage Oil?



Can you mix regular and high mileage oil?

Yes. It won't harm your engine to mix, for example, Quaker State® motor oil with Pennzoil, as long as the oil you use is the weight (or viscosity) recommended in your vehicle owner's manual.
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When should I start using high mileage oil?

The first is to switch when your vehicle reaches 75,000 miles. The second is to switch if your older vehicle is beginning to show signs of engine loosening. If you notice an oil drip, that's a sign you should start using high-mileage engine oil.
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Is high mileage oil better than synthetic?

Myth: Full synthetic oil is not good for high mileage cars or older vehicles. The myth is rooted in the idea that synthetic oil is “slipperier”—lower in viscosity, or not as compatible with seals and will therefore leak or leak more in places conventional oil might not. Again, completely untrue.
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What happens if you don't change your oil for 10000 miles?

Depending on the vehicle and oil, the time between oil changes could range from 3,000 to 10,000 miles. But what happens if you decide to skip oil change? The end result is that your engine won't last as long as it could. It might also mean an extravagant bill for an engine replacement or a sooner-than-expected rebuild.
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Is Thicker oil better for older engines?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil - 10W - can help protect worn engine bearings as well.
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Can you switch to synthetic oil with high mileage?

You can switch from conventional motor oil to Mobil 1™ synthetic oil (and back again, if you want) without following any special procedures. There are two exceptions to this: a higher-mileage engine that has never used synthetic motor oil, or an engine that has used conventional motor oil and been poorly maintained.
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What's the best oil for high mileage cars?

10 Top-Rated Oils and Additives for High-Mileage Vehicles
  • Valvoline High Mileage with MaxLife Technology Synthetic Blend Motor Oil. ...
  • Pennzoil High Mileage Motor Oil. ...
  • Slick 50 Recharged High Mileage Treatment. ...
  • Gumout Fuel System Cleaner. ...
  • Royal Purple High Mileage Synthetic. ...
  • Techron Fuel Cleaner. ...
  • Mobil Super High Mileage Oil.
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What is considered high mileage oil change?

Some people might consider switching to a high mileage oil at 200,000 miles, while others may want to change to a high mileage oil at 80,000 miles. For the average driver, anything over 100,000 miles could safely be considered a high mileage vehicle.
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What is considered high mileage?

What is considered high-mileage? Typically, putting 12,000 to 15,000 miles on your car per year is viewed as “average.” A car that is driven more than that is considered high-mileage. With proper maintenance, cars can have a life expectancy of about 200,000 miles.
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Is 5w30 good for high mileage?

Amazon Basics Full Synthetic is the best 5w30 oil for high mileage vehicles. This oil should only be used on vehicles exceeding 75,000 miles. This motor oil is formulated for longer drain intervals. It helps in preventing a build-up on drain intervals and preventing rust and corrosion.
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Can you go 2000 miles over oil change?

Some drivers push it an additional 1,000 or 2,000 miles, but even changing your oil that frequently may be unnecessary. Depending on your car, you might be able to drive 7,500 or even 10,000 miles between oil changes without putting your vehicle's life expectancy at risk.
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Whats the longest you can go without an oil change?

Cars can generally go 5,000 to 7,500 miles before needing an oil change. Furthermore, if your vehicle uses synthetic oil, you can drive 10,000 or even 15,000 miles between oil changes. Continue reading to learn more about oil changes or skip to scheduling your oil change right here on our website.
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Is 10 000 miles too long for an oil change?

Most auto manufacturers today recommend oil changes between 6,000 and 10,000 miles, but there are some manufacturers that go as high as 15,000 miles. Even if you are on the low end of the scale, you would still be changing your oil at least twice as often as necessary if you stick to the old 3,000 mile recommendation.
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What is the best oil for an old engine?

When you're choosing the best oil for older cars or high mileage engines, there are several criteria you can look at.
  • Pennzoil High Mileage Conventional Motor Oil. ...
  • Castrol GTX Part-Synthetic High Mileage. ...
  • Valvoline MaxLife High Mileage Synthetic Blend. ...
  • Mobil1 High Mileage Engine Oil. ...
  • Amsoil Premium Protection Motor Oil.
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Can I mix synthetic and regular oil?

So, in the end, conventional and synthetic oils are comprised of the same, compatible components – it's just that the components in synthetics are much higher quality. While you can safely mix synthetic and conventional oils, you're doing nothing more than diluting the performance of the synthetic oil.
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Why can't you go back to regular oil after synthetic?

Synthetic oils typically provide better protection than conventional oils, but switching back and forth between full synthetic and conventional oil will not damage the engine. Of course, this depends on the current engine condition and the quality of the conventional oil being used.
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What are the disadvantages of synthetic oil?

A few disadvantages of synthetic oil to be aware of include: Probably the most glaring downside of synthetic oil is the cost. The price of synthetic oil is around two to four times the price of conventional oil. Synthetics may be more prone to additives precipitation during cold storage conditions.
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What additive keeps engines clean?

Dispersants. Dispersants are mainly found in engine oil with detergents to help keep engines clean and free of deposits. The main function of dispersants is to keep particles of diesel engine soot finely dispersed or suspended in the oil (less than 1 micron in size).
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Is it worth it to get synthetic oil?

Is synthetic oil better for my engine than conventional oil? Yes, synthetic oil is better for your engine than conventional oil. Although conventional oil (i.e., mineral oil) can provide adequate lubrication performance, it can't compete with the overall engine performance and protection provided by synthetics.
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Is 10w30 better for high mileage?

10W-30 motor oil makes for a decent high-mileage oil. It gives a better fuel economy while reducing the oil consumption for older engines. Older engines with more than 75,000 miles on them require a thicker oil that will properly lubricate their critical engine parts and prevent oil leaks, sludge, and deposits.
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