Is it OK to mix two motor oils of the same viscosity type? What about mixing different brands of engine oil or mixing conventional and synthetic oil? Can you mix motor oils for gasoline and diesel engines? But I would like something between the 10W and 15W products that are offered. Does this work? Answer: Mixing two different motor oil weights to make your own custom viscosity does not work quite as simply as it sounds.
There a couple of unknowns and even some potential complications that have to be considered. As the additive formula used to construct each viscosity 10W and 15W in this case can utilize different chemistry, there simply is no way to project how well the mixture will actually work and whether the longevity of the oil mix will be affected. Teh numbers are the viscosity Thickness — the first is when its cold, the second is when its hot.
If you really must mix oils, try to keep to the same Brand and type if possible. Assuming you know whats in there to start with. What year of F have you got? Home maintenance is a bit of a small prob for me as on street parking ehich usually means my car is in a different street or boxed in so hard to work on…. Give a local garage or Mr Clutch a call. If it is just a top up then you can mix it without much worry. How is the viscosity of the final product regulated???
Thank you. All mineral oils are produced from the same basic petroleum feedstocks. Different oil viscosities will not separate or react negatively to each other because the base oil is molecularly the same.
It's the different oil additive systems between brands that shouldn't be mixed - if you're concerned about the oil performing exactly how it was designed. Oil additives include: Anti-oxidants to prevent thickening at high operating temperatures. Pour point depressants which lower the temperature of wax coagulation alkaline materials to neutralize acids formed during combustion. Rust and corrosion inhibitors. Detergents to reduce sludge and varnish. Dispersant additives to hold contaminants in suspension.
Extreme pressure additives to prevent metal to metal contact under high loads. Viscosity index improvers in formulating muilt-grade viscosity oils. The exact type and amount of these additives varies between brands and when mixed may not function as efficiently as desired.
Different viscosities of the same brand oil will have different amounts of viscosity index improvers polymers , but otherwise the additive systems will be the same. Unfortunately, only the Valvoline 5W oil is available in the car care shop nearest you.
In which case, you can use the Valvoline 5W oil as a top-up. But you must remember that these oils vary slightly in chemical levels. This is what makes the brands distinct from each other. Therefore, even if both are 5W, they slightly differ in viscosity.
While it is acceptable to mix a different brand as a top-up, it is not recommended. But you want to switch from conventional to synthetic oil. Is this possible? The answer is yes. Switching from conventional to synthetic should not be a problem. But if you mix a large amount of synthetic oil with a large amount of conventional oil, it will most likely damage your engine. Heavy-duty diesel engine oil and gasoline engine oil indeed perform the same functions.
But their operating environment is not the same. In most cases, diesel engine oils meet the standard industry specifications for gasoline engines. But in the case of gasoline engine oils, they do not match diesel engines at all. Gasoline engine oils are not at all equipped to handle the pressures of heavy-duty diesel engines.
There are, however, formulas that are designed specifically for both diesel and gasoline. In which case, you can do this. Just make sure that the manufacturer confirms this and that it is ideal for your vehicle. But if you intend to mix them out of your own discretion and without professional guidance, this is not a good thing to do.
So, to reiterate, it is possible to top up a gasoline-powered vehicle with diesel engine oil for as long as it meets proper industry specifications. On the contrary, topping up a heavy-duty diesel engine with a motor oil designed for gasoline engines is not at all advisable. Now that we have discussed the disadvantage of mixing oil weights, it is best to learn more about oil weights.
It instead talks about the viscosity or the thickness of the motor oil.
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