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Hi guys. I have a question regarding engine oil. My ride is a 2006 Mazda 2 with about 168k km on it.currently it is using fully syntetic 5w40 engine oil. The engine oil viscosity was not recommended in the user’s manual. I’m think of changing to Pennzoil ultra 5w30 which is the recommended oil from the user’s manual. Question is, there are so many types of oil recommended in the manual. Which is the best Oil for my climate and type of driving? I live in a humid environment and average ambient temperature is around high 20s to mid 30s degrees Celsius. My commute to work is less than 25km and I do plenty of short distance drives, stop and go kind if driving. My lifters are also producing a tickig noise when cold, I’m thinking that its wearing out fast. I do an oil change every 10000km. Seeking advice from you experts out there. Thanks.
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