You cant adjust the engine if thats what you mean, if you want to run regular I would use regular and see how it runs, if it starts acting up and not running right I would use octane booster to see, if not switch back to premium.
I used to drive my mustang over 30 miles per day on regular gas when called for high, I just used fuel injector cleaner more often.
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Wednesday, April 23rd, 2008 AT 7:31 PM