I was using the recommended 0W-20 Oil in my Insight since I got it in 2014. It is Mobil 1. I recently was speaking with a well known Mechanic here in Central Florida that insists that Honda's specs of 0W-20 are way to light for driving in Florida conditions due to the extreme heat we have here. He insists that at a minimum we should be using 0W-30. I can understand where he is coming from because it does get quite hot here. Roadway asphalt temps can sometimes be 120 degrees. I checked Mobile 1's website and indeed it says for the Insight can use either 0W-20 or 0W-30. I am going to try the 0W-30. My question is will it adversely effect the MPG? I bought the oil so on my next change I guess I will have the answer but wanted to throw this out there for some comments and opinions.