New Chevy 6.0L gasser -- Octane?
Just bought the new Chevy 2500HD with 6.0L gas ... and wondering what you guys run for octane. And why you choose it? -- The 'why' is important too ... because it's not just about mpg, it's about ...
Forum Discussion
Knock sensors never advance the timing. Timing is set at a base table and if knock is sensed they will retard the timing until knock is no longer sensed and then return to the base table.
With modern computer control, engines are monitored so tightly that even slight changes in weather or altitude can make a difference in what octane to use for most efficiency. For instance, on a hot day at high altitude you will be able to get by with regular gas or on a cool or cold day you might have to use premium to keep detonation away. Same way with altitude. The closer you are the sea level the more octane you might have to run for best efficiency.
As you can see, it can depended on a lot of things. Bottom line is, the OP is just going to have to try different octane fuels and see for himself what works best for his situation and engine.
With modern computer control, engines are monitored so tightly that even slight changes in weather or altitude can make a difference in what octane to use for most efficiency. For instance, on a hot day at high altitude you will be able to get by with regular gas or on a cool or cold day you might have to use premium to keep detonation away. Same way with altitude. The closer you are the sea level the more octane you might have to run for best efficiency.
As you can see, it can depended on a lot of things. Bottom line is, the OP is just going to have to try different octane fuels and see for himself what works best for his situation and engine.
