Hmm......

Dear Aero....non synthetic is Dino, Dino is short for dinosaur......oil derived from purification and distillation process from Dino Fossil and therefore is call dino oil or non synthetic.

I thought Shell Helix is synthetic. Maybe there are other grades....within Helix that is non synthetic.

Hmmm, interesting. Dat wil save us heaps man. Very tempted....

CuscoreX, 1.5 at idle. Think dis is not good tho....

MM is using Shell Helix?? Wonder why they are not using the Mazda Rotary oil.

Hi Fab 8,

I knew from my SE that they MM used to carry Rotary oil but were all sold to those who own RX7 and currently no stock. Since now they have brought in the RX8, I think they will also be brings the Rotary oil again soon. My SE is still checking for me, I will get a reply from him soon.

Guys, this topic has already been discussed to death. I'm closing this thread and moving it to the Tech Garage, where, if you do a search, you'll find PLENTY of threads discussing this same topic. For example:

https://www.rx8club.com/series-i-tech-garage-22/synthetic-oil-renesis-engine-16430/
https://www.rx8club.com/series-i-tech-garage-22/regular-synthetic-27868/
https://www.rx8club.com/series-i-tech-garage-22/synthetic-oil-organic-30282/