Even though this multi grade engine oil can be used in a colder temperature, it’s better suited for warmer weather. On the other hand, the slightly thicker oil,10W-30, provides better lubrication for commercial vehicles and heavy-load engine cars. It also provides a better cold temperature start than 10W-30 oil. Suitable Vehicle TypesĥW-30 multi grade oil is ideal for private vehicles and light-duty petrol and diesel engines. Since both 5W-30 and 10W-30 are multigrade oil types, they perform well within a large temperature window.ĥW-30 oil type works within -30 oC to 35 oC, whereas 10W-30 oil type works in a relatively smaller temperature range of -18 oC to 30 oC. That said, their hot temperature performance won’t equal that of a higher viscosity oil like 10W-40. Since 5W-30 and 10W-30 have an oil viscosity of an SAE 30 single grade oil, they can resist becoming a thinner oil in higher temperature conditions. When this number is higher, you get a thicker oil at a high temperature. The number after the ‘W’ denotes the oil viscosity at a high 100 oC (212 oF), often known as the engine’s operating temperature or ambient temperature. It’s also worth noting that synthetic oil formulations will hold up better in a colder temperature than their conventional oil counterparts, thanks to reengineered molecules. This also implies that both multi grade oil types perform relatively well in cold temperature climates when compared to other oils. Since both have low winter-grade oil numbers, they both have low temperature viscosities. However, note that both the engine oils, 5W-30 and 10W-30, are SAE-graded for winter performance. Since oil 10W-30 has a higher number before ‘W,’ it won’t flow as quickly as 5W-30 at a lower temperature. So when you compare 5W30 vs 10W30, 5W30 oil has a lower number (5), implying the oil thins fairly in an extremely low temperature, making it a better winter engine oil than 10W-30. Now, the lower the number before ‘W’ is, the less likely the motor oil will thicken at a low temperature. This number is important for your engine startup when the engine is still in the freezing ambient temperature of a colder climate. To understand the oil’s viscosity at a low temperature, meaning anything under 0☌ (32☏), just look at the first number before W in the SAE oil number. 5 Ways To Compare 5W30 Vs 10W30Įven though both the oils are multi grade engine oil types, there are some prominent differences between them: 1. With that said, let’s see how each engine oil grade holds up against the other. Viscosity improvers are what allow a multi grade oil to resist thinning or thickening in a higher or lower temperature, respectively. Note: A single viscosity grade motor oil (like, say, SAE 30) doesn’t use viscosity index improvers.
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