Hi, I am new the Rx8 world and I love my car. I was a supra enthusiast/owner previously, so I'm in the dark completely with the rotary engine. Is there anything right off the bat I should know about up keep on this car? I've been researching online and see there is a lot of controversy about whether to use 5w-20 vs 5w-30 oil they say the lighter weight is for the epa mpg standards and the 5w-30 will protect the engine better. Is there any truth to any of this?