it gets driven hard and daily, and i do about 2500 mile intervals. do you reccomend 10w30 for close to stock tuning in southern california weather

 

i use renesis stationaries and 120 psi oil presure...
5w20 in the winter, and 10w30 or 40 in the summer. but that's just my setup. i don't track it yet, but when i do, it'd probably be 10-40 mobil one.

i'd say just use whatever the oil cap says on it. mazda made that recommendation for a reason.

 

Catrol GTX

 

I have used Castrol GTX in both of my 7's and never had any problems. And I beat on both of those cars pretty bad.

 

+1

Now if we can get Icemark to confirm it will be canon. ;P

 

funny ive heard that this oil is complete garbage LOL everybody has their own opinions, im just going to just keep on using my valvoline non synthetic 10w30 for now

 

gtx is good for people who don't premix. i haven't read too deeply into it, but something with the low-ashing properties.