High Octane Gas?
I have a 2014 2500 HD Ram with the 5.7 Hemi.. and have been putting reg gas in it. With the camping season upon us and towing every other weekend, should I be putting a higher octane in it? Will this ...
Forum Discussion
gcloss wrote:
The owners manual for my 2012 Ram 2500 with 5.7 Hemi calls for 89 octane, with a note that 87 octane can be used.
When towing I always use the 89 octane because there is a notable increase in performance from 87 to 89 octane.
Really?
That's interesting because my 6.1 Hemi will run like a scalded ape with 87 or the reccomended 91. No deto and the original plugs looked great at 80k mi when I changed them.
Gets the same mileage too.
To the OP, use whatever is reccomended. Newer engine management systems will compensate for lower or higher octane to a degree with timing, but no sense in waiting $ on higher octane than reccomended.
I'll run higher than reccomended in some higher perf engines either to compansate for potential bad fuel quality or detonation protection in 2 strokes, but realistically I'm wasting my $ too.
And at high altitude you can drop the octane requirement a little in naturally aspirated engines. Less air needs less bang to go with it. That's why you see 85 at the pumps in the mountains out west.
