I live/drive in Central Florida, where Summer temps average 85-95 max. My dealer is claiming that this is an =91extreme=92 climate condition and wanting to use 5W-30 semi-synthetic blend oil, vs. the OEM recommended 5W-20, in my =9208 CR-V. I disagree, and would like to know what others think.
FYI: I=92ve driven my 01 Civic 250,000 highway miles in this climate using the recommended 5W-20, and it STILL gets 38-40 mpg on I-95 at 70 mph.