My Leola, I am changing my 2006 Mazda Miata (NC) oil. I am a true to one that vehicle runs and is winning races today on these mixtures. I have and continue to use Bosch Premium Filters, Shell 5w30 Conventional Oil, running Shell 93vp only the best. I have noticed that running this oil has lowered my overall oil temp/P by a mark and a half, reading a properly operating gauge cluster. 5w20 runns WAY TO HOT!!! at 4500rpm and higher. If you have any questions please leave a comment, I will get back shortly.