mazdaspeedster3
Member
- :
- Mazdaspeed3. 2008
Ok, I have seen some discussion amongst people about high octane fuel and the CX7. I am turning my 07 lease in on Monday but just got back from the dealership and had this exact conversation with my sales person and a tech about the high octane fuel and people getting hit with lower trade in dollars on the 07's because of this...
I have not ran but the first tank of gas (dealership supplied) with high octane fuel. The 07 called for Premium but with a high mileage commute and limited funds I ran 87 or 89 octane only. I never threw a cel nor had any problems with the vehicle what-so-ever! Even having it plugged in to their computer they could not tell it never ran premium, 23500 miles. The 08 lowered the rating for fuel and "suggested" premium (no change to the motor or compression at all) and now the 09 does not ask for premium at all (no change to the motor or compression). I was told by the tech that the ECU would adapt for the lower octane and run fine. At most you MIGHT notice a slight decrease in power but the average person would not know a difference in performance what-so-ever.
I just wanted to clarify this because several people including the service writer were perplexed as to my not having problems and never running premium. No BS I never ran premium and I have all gas receipts and maintenance records with mileage per tank on each reciept. We averaged 22 MPG and at times saw 26 MPG highway. Once my wife got 28 MPG on a long trip to Northern Michigan. The only mod on the vehicle was a K&N Drop in filter and Synthetic Oil (mobil1).
Moral of the story, dont throw your money away running premium when you dont have to. It is affordable now but wont be in the very near future...
I have not ran but the first tank of gas (dealership supplied) with high octane fuel. The 07 called for Premium but with a high mileage commute and limited funds I ran 87 or 89 octane only. I never threw a cel nor had any problems with the vehicle what-so-ever! Even having it plugged in to their computer they could not tell it never ran premium, 23500 miles. The 08 lowered the rating for fuel and "suggested" premium (no change to the motor or compression at all) and now the 09 does not ask for premium at all (no change to the motor or compression). I was told by the tech that the ECU would adapt for the lower octane and run fine. At most you MIGHT notice a slight decrease in power but the average person would not know a difference in performance what-so-ever.
I just wanted to clarify this because several people including the service writer were perplexed as to my not having problems and never running premium. No BS I never ran premium and I have all gas receipts and maintenance records with mileage per tank on each reciept. We averaged 22 MPG and at times saw 26 MPG highway. Once my wife got 28 MPG on a long trip to Northern Michigan. The only mod on the vehicle was a K&N Drop in filter and Synthetic Oil (mobil1).
Moral of the story, dont throw your money away running premium when you dont have to. It is affordable now but wont be in the very near future...