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when does oil lose its viscosity

Viscosity changes based on load and temperature.

Castrol produces a range of conventional and synthetic oils, including Castrol GTX, Castrol EDGE, and Castrol EDGE High Mileage. There is no official expiration date on oil like we get on food. As the oil circulates around the engine it picks up dirt such as soot and microscopic slivers of metal worn away from the moving parts. If you are having trouble with a mineral oil losing viscosity at high temperatures, look at switching to a synthetic oil for the application. Basically, you want thicker oil in the summer and a thinner one in the winter. Dynamic vs. Kinematic Viscosity: What's the Difference? A good way to tell when your oil has worn down from too much repeated use, is if the engine knocks when you start it up in the morning.

But what is oil viscosity and what does it have to do with your motor oil? This forms a base, or alkali, that remains stable at both very high and very low temperatures. Excessive fuel dilution leads to sludge and varnish, requiring the oil to be changed more often. A fresh oil change will take care of that knock, and the viscosity is truly the reason you want to change out your oil frequently. Very knowledgeable and very efficient.

Another possible degradation cause is oxidation, more likely with a container that’s been opened, which is where the oil molecules react with oxygen molecules in the air and this time viscosity increases forming sludge and sediment. Let's assume a CLOSED system where the oil is ever only in contact with metal (like a sealed transmission containing no air with bladder expansion chamber). It depends on the kind of engine you have and the way it functions. The main factor that dictates the shelf life of motor oil is its composition. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM.

Does the Viscosity of Your Oil Affect the Filter You Should Use? Extremes of temperature can affect oil in different ways. Your email address will not be published. Motor oil is vital to engine function. Oils operating at extreme high temperatures can begin to crack thermally. Vinegar is thin and flows quickly when it is poured. Typically, motor oils stay stable and have a shelf life of up to five years. Motor Oil Viscosity 101. Fast, free online quotes for your car repair. After all, when viscosity has not changed, you can rightly conclude that the many known viscosity-altering factors are probably not occurring. The oil forms a fluid barrier between the moving parts, lowering friction and, crucially, reducing wear on major engine components like pistons, connecting rods, crankshaft and of course the cylinder linings of the block itself. Ramon was friendly and helpful. Clearly there is a vested interest in their future sales here so to get to the truth about oil we need to drill down deeper. Key to this is whether the oil is, and what additive ingredients there are.

If this happens, it is a good idea to change the oil. Viscosity generally have standard limit set for increases and decreases: Upper limits are usually set at a 10% increase for Caution and a 20% increase for Problem or Critical. Just looking for some opinions. Usable motor oils have a clear appearance and if you notice any milkiness or haziness, that is a sign of water contamination. Motor Oil Disposal – The Easiest Way To Collect It?

, such as the greater demands of heat tolerance in modern engines. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Oil Analysis, Skills and People – keeping you informed. It’s rolling on probably 5 years old or so. Other oil additive products include Rislone Nano Prime, the most advanced oil + performance booster we’ve ever developed. But what is oil viscosity and what does it have to do with your motor oil? Your car’s manufacturer has figured that out for you and printed it in your owner’s manual. The oil forms a fluid barrier between the moving parts, lowering friction and, crucially, reducing wear on major engine components like pistons, connecting rods, crankshaft and of course the cylinder linings of the block itself. There are so many important factors about viscosity, viscosity index, temperature, dynamic and absolute viscosity, base oils, additives, monogrades, multigrades, synthetics, testing, trending, limits and more, there is so much that there simply isn't enough time to place all the information into this document, I have explained the basics and you should now have an understanding of what viscosity is and how important it is, if you would like to know more?

Most motor oils contain alkaline additives that work to neutralize the acidic contaminants.

The cost of oil is relatively cheap compared to engine components so you might be best purchasing new oil for your car’s engine and protecting it against failure.

If you’ve got a car and either a garage or shed, the chances are you’ve got some old engine oil kicking about. Over time, your oil can also lose viscosity. Make sure the oil and oil filter is changed according to the mileage intervals given in the owner’s manual or if the car has been sat unused for more than a few months. When oil is heated its viscosity is reduced, this reduces its load carrying capacity. Key to this is whether the oil is synthetic and what additive ingredients there are. Inside the internal combustion engine, hard metal surfaces slide backwards and forwards across each other at high speed and at very high temperatures. If you have stored the motor oil in a cool, dark place and it has not passed the expiry date, you could use it. When it wears down, it doesn’t have the ability to handle the high temperatures found inside the engine. When changing your motor oil it is advised that a trash bag is put underneath the pan – that way the majority of the oil can be collected in an easily transportable way with minimal effort. Whilst premium brand fully synthetic motor oils can be quite expensive and you might be reluctant to waste it, compared to having major surgery on your engine to replace worn components caused by filling up or topping off with degraded oil. Motor Verso is an automotive website; for car enthusiasts, run by car enthusiasts. No oil is invincible, after all. Brand is less of an issue but it’s probably best not to mix brands as they’ll have different additive recipes which may not work as effectively together. How do you know what kind of viscosity your oil needs to have? Fresh engine oil is a clear, free-flowing liquid blend of base stock and additives that contains no fuel, water, coolant, dirt, or other contaminants. Well, the 3-month/3,000-mile rule was the rule of thumb way back when for good reason and, although it continues to have merit, the prevailing automotive advice has shifted a bit.

However, you must check it carefully for its consistency. The most popular service booked by readers of this article is Oil Change. Viscosity is simply a measure of the thickness of your oil. Oil shouldn’t be used after a few years; the exact period varying between 2 years (according to Total) up to 5 years (Mobil). While the oil analysis community is aware of the usual suspect conditions or events, some remain undiscovered or at least are not fully understood.

Potentially, depending on the oil. So does motor oil expire? However, this stability can depend on a number of factors and it is always advisable to follow the manufacturer’s storage instructions. Usually 4-cylinder engines use five quarts of oil, 6-cylinder engines use six quarts, and V8 engines use eight. The oil company Pennzoil said this regarding oil’s toxicity; ‘Used oils may contain harmful impurities that have accumulated during use. Or to find out where you can buy quality oil additives near you, use our locator here. You will see oil viscosity measurement in lube articles stated in kinematic (kv) and absolute (cSt) terms. Oil endures constant heating and cooling in your motor, from below freezing to 225 degrees F in a normal motor. Mechanics do not have the necessary field test data, or laboratory data, to wisely specify oil change intervals other than what... Get a fair & transparent quote instantly before booking. The viscosity of the engine oil will depend on whether the oil is, for example, in the sump, the pump, the cooler, between the cam and followers, or in the crankshaft bearings. If you have ever looked at a bottle of motor oil, you have noticed a difference in oil weights. Motor Oil Disposal – Where To Get Rid Of Waste Oil? The hydrocarbon molecules in synthetic motor oil spread evenly through it. What do these numbers mean and why do they matter? Another factor in oil viscosity is that it is affected by temperature. by carrying away dirt and debris from high wear areas.

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