Mazda 6 Service Manual: No.7 slow return to idle

No.6 cranks normally but will not start

No.8 engine runs rough/rolling idle

Other materials:

Mazda 6 Service Manual: Recommended Oil
U.S.A. and CANADA Use SAE 0W-20 engine oil. Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 0W-20 Oil is required to achieve optimum fuel economy. For maintenance service, Mazda recommends Mazda Genuine Parts and Castrol® (U.S.A. only). Only use SAE 0W-20 oil “Certified F ...

Mazda 6 Service Manual: Vehicle Loading
WARNING Do not tow a trailer with this vehicle: Towing a trailer with this vehicle is dangerous because it has not been designed to tow a trailer and doing so will affect the drive system which could result in vehicle damage. This section will guide you in the proper loading of your vehicle, t ...