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Showing results for tags 'hot weather oil selection'.
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Hello, I am new to this forum and unfortunately I was unable to find the answer for my issue, so I decided to open a new topic. I live in a region where air get as hot as 45C degrees (113F) in summer and rarely gets below -10C (14F) in winter. I drive 2002 Tahoe 5.3LT with 168000 miles on it. And aI am concerned about the engine oil to be used. I obtained it a year ago from the owner who used 10w40 synthetic oil. I switched to 5w30 as per oil cap and specs. Though as far as I know 5w30 is only suitable for usage in environments up to 30C degrees the engine sounds and feels smoother...(I may be mistaken) I think about switching to more suitable oil for hot weather conditions, especially after I saw notes about high mileage engines must be lubricated with more viscose oil..(10w40, or 15w50 or any other) Could you please recommend the right oil to use? I am looking forward to keep up the engine in the best shape - so price does not matter Thanks in advance!