If, for instance, clearances between engine components have increased, gotten sloppy, a thicker oil can help to fill the void. Within reason, thicker oil maintains a better lubricant film between moving parts. Some have even used thicker oil in a leaky engine to prevent oil from seeping out.
Does thicker oil increase horsepower?
Higher or heavier viscosity oil drives up the oil pressure which in turn makes the oil pump work against a higher resistance. … In the case of the oil pump, using lower viscosity oil allows it to turn easier which simply frees up some horsepower.
When should I use thicker engine oil?
Identification. For an older, high-mileage passenger car, it is recommended to switch to a thicker viscosity oil, such as 10W-30, when approaching and passing 100,000 miles, to lubricate the engine well for preservation.
Is 5w30 oil thicker than 10w30?
10w30 is thicker than 5w30 because it has a higher viscosity in low temperatures. … Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil. Thicker oil offers better lubrication of motor and engine parts.
What happens if I put 10w40 instead of 5w30?
Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.
What if I use 0W 20 instead of 5w30?
0W-20 OIL. … It readily means that the 0 oil will flow well and better at a cold temperature more than 5W-30 oils even while maintaining the same viscosity. The 0W-20 is said to be the best oil in the market because it helps to reduce environment hassle on waste oil disposal.
Is 10w40 good for high mileage?
If both 10w30 and 10w40 are acceptable oil options for your car, it’s recommended that you use 10w40 for your car with high mileage. … The thicker oil helps older engines handle higher temperatures and manage wear and tear more efficiently. The thicker oil will reduce wear and tear and extend the life of your engine.
Is 10W40 thicker than 20W50?
Is 10w40 good for high mileage? 10W40 is not better than 20W50 for high mileage. The difference between 10w40 and 20w50 is simply that the latter is thicker. As far as gas mileage goes, no oil will improve your gas mileage by changing from 10W40 to 20W50 or vice versa.
What 10W40 means?
The designation “10W-40” indicates a multigrade oil that is toward the low end of the SAE scale in cold weather, but at the upper end in hot conditions. 10W-40 oil is therefore good for a wide range of weather conditions.
When should I use 20W50 oil?
20W50 motor oil is suitable for warmer climates, where the higher temperature causes the oil to thin. It is also useful for vehicles subject to hot temperatures and for those used for high-stress activities such as hauling or pulling trailers.
Is 10W40 thicker than 5w30?
A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine’s moving parts more than the lower viscosity 5w-30 oil.
Is 10W30 good for high mileage?
Mobil Clean High Mileage 10W-30 is designed for vehicles with more than 75,000 miles. Its advanced formulation helps protect seals and prolong engine life. … These oils protect against sludge and engine rust and corrosion under high and low-temperature operating conditions.
Can the wrong oil damage your engine?
Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.
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.
Does thicker oil burn less?
A lot of oil-burning takes place because an engine’s piston rings are worn out, and thicker oil won’t fix that. … They also count on low-viscosity oils to reduce friction and drag (the work of simply moving the engine parts through thicker oil), which improves mileage.