Regular or premium
I know that Chevy recommends premium gas in the 6.2L engine. What do all of you out there use? Is using regular a bad idea?
Forum Discussion
noteven wrote:
Modern auto engines do not ping - knock detection adjusts timing and fuel to prevent any pre-ignition or detonation.
So when you buy an engine that is designed for 91 and you use 87 or less in it will run fine. It is not producing the power you paid for is all. Sometimes the vehicle will use more 87 per mile than 91, especially if you are tow / hauling and actually using max power.
Yes and no. While most modern engines can adjust to a certain octane, they can only pull so much timing and alter the cam profile to a certain degree. If the ECU pulls as much timing as it possibly can and the engine still knocks, then it is time to increase the octane. This issue is compounded with single cam pushrod engines versus overhead cam engines that have more flexibility and control of valve overlap along with ignition timing.
