To get the Challenger R/T’s maximum power rating of 376 horsepower, 91 octane rating or higher is recommended. Dodge says regular unleaded gasoline with an 87 octane rating is acceptable, but the R/T’s full power won’t be achieved with the lower octane.
If you opt for an automatic Challenger R/T, Dodge recommends mid-grade gasoline of 89 octane or higher, 87 octane is acceptable; automatic-equipped Challengers are rated with four fewer horsepower and nine fewer pounds-feet of torque than the manual.
The 2010 Mustang GT runs on regular octane to make its peak power; the 2010 Camaro SS recommends premium.
See if your question has already been asked and answered
Your question has been successfully submitted to Ask.cars.com. It will now be reviewed by our editors and we'll answer it soon if we think it's a useful question. You will be notified via e-mail when the answer is posted. Ask.cars.com tackles your questions about new cars and the car-buying process. Unfortunately we can't answer questions regarding:
Have our experts answer any of your questions about new cars.
Email us at firstname.lastname@example.org