New oil vs old oil
I have two largish containers of extra virgin olive oil. One is ~5 months old, the other is ~17 months old.
Any way to distinguish which is which?
Best Answer
"Unlike wine, olive oil does NOT improve with age. As olive oil gets older, it gradually breaks down, the acidity level rises, and flavor weakens. Extra virgin olive oil keeps better because it starts with a low acidity level, but it should ideally be consumed within 18-24 months of harvest."
https://www.oldtownoil.com/blogs/frequently-asked-questions/does-olive-oil-improve-with-age
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Is new oil better than old 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.Does new engine oil make a difference?
Better motor oil is also likely to improve performance, as all the parts of the engine can run more smoothly. This can mean a more responsive car and better fuel economy. There's a reason high-performance engines demand the best oil and top-tier performance oil additives.Can I put new oil with old oil?
What happens if you put new oil on top of old oil? When you mix new and old oil, the new oil becomes \u201cwatered down\u201d with the lack of interfacial tension and strains to do its' job. Be sure to have your oil changed as soon as possible.Can old oil damage your engine?
Dirty oil can be even more damaging than no oil at all. If your oil loses its viscosity or becomes infested with dirt, metal and other debris, it could become actively corrosive, effectively speeding the process by which your engine parts wear down.Used VS New Oil in your Car | Fifth Gear Classic
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