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In most temperate climates, a 10W oil will suffice, but the best motor oil for high mileage engines in cold weather will start with 5W or even 0W.
Should you use thicker oil with high mileage cars?
High-mileage motor oil doesn’t hurt and it could prevent leaks from starting. Some mechanics recommend switching to a thicker (higher viscosity) oil — such as 10W-30 full synthetic oil instead of 5W-20 full synthetic — or using oil additives to stop leaks.
Is 10w40 good for high mileage?
Mobil 1 High Mileage 10W-40 motor oil is recommended by ExxonMobil for use in high mileage vehicles (even those that have used lower quality conventional oils†), including: Cars.
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.
Is 5w30 good for high mileage?
5W-30 motor oil is the top viscosity recommendation by automakers over the past four decades for use in many vehicle types. Furthermore, high-mileage 5W-30 motor oil is specially formulated for late model vehicles or newer vehicles with over 75,000 miles/120,000 kilometers.
Is high mileage oil thicker or thinner?
Is Thicker Oil Better For Older Engines? The use of thinner oils allows new engine parts to be lubricated more quickly. The oil in older, high-mileage engines, on the other hand, is thicker to prevent friction and oil loss.
When should you use 20w50 oil?
What Is 20W-50 Oil Used For? 20W-50 is a common motor oil used in moderate-to-large diesel and gasoline engines, high-performance motorcycle bikes, and aviation vehicles. Its resistance to thinning at high heat also makes it popular as a racing oil and high temperature driving.
What happens if I put 10W40 instead of 10W30?
10W40 oil has a higher viscosity, retaining more thickness than 10W30 as the temperature rises. In that case, 10W-40 motor oil would technically provide better protection against engine wear contact in higher temperatures.
Is it OK to use 10W40 instead of 10W30?
Similarly, SAE 10W-40 motor oil performs well in cold weather conditions. It has the same low-temperature limits as the 10W-30 but is better in higher temperatures. Either 10W30 or 10W40 for summer use is fine; however, 10W-40 motor oil will better protect your engine.
Which high mileage oil is best?
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.
Can I use 10w30 instead of 5w30 High mileage?
Can I Mix 10w30 and 5w30? Most oils will mix perfectly, provided they have a similar synthetic. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. Mixing the viscosity of oils will not have any effect on the engine.
Can you switch from 5w30 to 10w30?
The oils only differ in cold weather viscosity. If you never see temperatures below zero F then either 5W30 or 10W30 is fine. If winter temperatures are regularly below 0 degrees F then 5W30 is what you should run and you can run it year round if the 30 weight is good according to your owner’s manual.
Can I switch from 5w30 to 10w40?
If your handbook recommends SAE 5W-30 AND SAE 10W-40, then you can change by all means, but the only difference will be slightly worse fuel economy and slightly harder starting when cold.
Is High Mileage oil thicker than regular oil?
High mileage oils contain viscosity modifiers that are durable and won’t diminish over time. This causes the oil to stay thicker for longer periods of time, helping protect your engine parts.
Can I mix high mileage oil with regular oil?
High-mileage motor oil. Mixing them will not improve the performance or efficiency of your engine in any way. Nor will mixing improve the oil performance, either. This is illustrated by these two equally important points: Adding synthetic oil to regular motor oil will not enhance the regular oil.
Which is better high mileage oil or synthetic?
So which one is better? The short answer is full synthetic is always better, but cost is the main reason why I buy high mileage oil vs synthetic oil. If you have over 75,000 miles on your modern car or truck, consider switching to a high-mileage motor oil.
Can you use 20w50 instead of 10w30?
The main reason for using 20w50 is to slow down oil burning. If this is the case, using 10w30 would speed up the burning. I have had oil burners before, and used 20w50 in the summer, with no problem. But, your car will be hard to start in very cold weather with 20w50.
Is 20W 50 too thick?
20W-50 Motor Oil Due to its high-viscosity, 20W-50 is suitable for hotter climates. It is highly recommended for older vehicles. It is important to note that 20W-50 oil may be too thick for many newer passenger cars and can cause serious engine damage. Check with an automotive professional before switching motor oils.
Should I use heavier weight oil?
Using oil that is thicker than recommended may lead to a decrease in fuel economy, a higher load on your engine, and even a shorter life for your engine. Conversely, using thinner, lighter-weight oil than recommended can cause excessive wear and shorter life.
Is 10W40 better than 20W50?
The smaller number, (the 20 part of 20w-50) describes how the oil behaves at 40 deg C and a 20w at 40 deg C is about 10 times thicker than your engine wants. A 10w-40 is better at around 6 times thicker and a 0w-40 is much better at about 4 times thicker.
What happens if I use 20W50 instead of 5W-30?
20w50 is actually thicker than 5w30. This will result in less fuel efficiency, less horsepower, and more engine damage because it will have to work harder to rotate. Trust the engineers that made your vehicle.
Which is better 15w40 or 20W50?
If you have a new engine that takes 15w40 it is best to use 15w40, but if you have a wore down 300,000 mile engine that takes 15w40, then 20w50 is probably king because you have thicker lubrication there, and it stick on your bearings, and all around moving parts more making it not wear out as fast.
