Hi Lord Lexis,
Using a heavier grade than recommended may cause decrease in fuel economy, higher engine loads and eventually shortened engine life. Using a lighter grade than recommended may result in excessive mechanical wear and reduced engine life. For maximum engine performance, follow the recommended motor oil viscosity and maintenance schedule provided in your vehicle's owner's manual. With this being said, there are some circumstances when using a thicker oil would make sense and that is primarily just when your bearing gaps begin to get larger. The ticker oil will help take up these gaps and prolong your engine life. However, the only way to know this is to monitor your engine oil pressure. When the pressure is steadily lower than normal, this normally means your oil pump is weak or the clearance in the engine components has increased.
If you are going to switch to a heavier oil, you need to make sure whatever you chose will work in the coldest months. This is when thick oil is detrimental to an engine because it takes longer to thin out and protect your engine.
Please let me know if you have more questions or if I can help in any other way. Thanks
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Thursday, May 23rd, 2019 AT 5:03 PM
