![]() To eliminate your fears, first, note that natural and synthetic oils are made from the same basic compounds. The most common fear for any motorist is whether mixing oils will cause a gel-like substance. Most of the time, you will find motorists mixing different oil types when you run low on oil, and at your next fuel station, you realize they do not have your usual motor oil. We have a great article on why you should consider using synthetic motor oil. Therefore, mixing synthetic engine oil with regular oil may have limited or no effects. Different companies make engine oil and has different chemical makeup thus, mixing two brands for an entire oil change interval is not recommended.Įach brand of engine oil has different additives with different roles. Mixing different engine oil brands because of topping up your oil level does not cause irreparable harm to your engine. This oil performs best at temperatures above 18˚C and below 30˚C. In addition, this oil provides better sealing capabilities required by older engines, hence, better protection of the engine’s moving parts. This multi-grade oil creates less drag on the moving engine parts and bearings, hence its high fuel efficiency.ġ0w30 oil is much thicker than 5w30 therefore, it is better suited for older vehicles and trucks. When deciding whether to mix these multi-grade oils, it is best to consider the temperatures of where you live and your engine’s age.ĥW-30 oil is reliable in both low starting temperatures (30˚C) and hot summer temperatures (35˚C). The other figure in the viscosity grade refers to the high-temperature rating (i.e., 30). The first number in the viscosity grade shows low temperature here, it is 5W and 10W. In addition, multi-grade oils become thinner in cold weather to adequately protect the engine as it warms up. These oils can start your engine at cold and normal temperatures of about 210˚F without compromising your engine's efficiency. Many cars and trucks use multi-grade oil, such as 5w30 and 10w30. Mixing Different Oil Grades Can You Mix 5w30 and 5w40 It also represents the resistance of oil to thinning at high temperatures. Therefore, it is essential to consider where you intend to drive and its average weather when choosing the best motor oil for your engine.Īccording to the scale, the Society of Automotive Engineers developed, engine viscosity is denoted using ‘XW-XX,’ with W referring to winter and XW showing viscosity at 100☌. For example, thin oils have low viscosity, ideal for cold temperatures, while thick oils have high viscosity levels, perfect for high temperatures. Mixing Engine Oils Mixing Two Engine Oil ViscositiesĮngine oil viscosity refers to the oil and its performance at specific temperatures. Motor oils have different grade ratings based on different factors. As a result, the oils operate uniquely in varied conditions. ![]() Motor vehicles operate on varying oil grades and viscosity. The big question is, can you mix oil viscosities? Of course, the simple answer is yes, but there is more to it than that. How Often Should I Change My Engine Oil?.Will My Engine Break Down when I Combine Two Different Oil Brands Like Castrol and Shell?.What Happens to Your Car when You Use the Wrong Oil?.Mixing Regular and Synthetic Motor Oils.Mixing Different Oil Grades Can You Mix 5w30 and 5w40.The Myths on Oil Viscosity Grades and Brands.
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