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I'd always recommend avoiding ethanol free gas as the ethanol adds good knock resistance to the fuel.The OTS tunes are great, but if you'd be interested in a custom tune for your raptor check out our results below. The advantage of a custom tune is that we can tune for the fuel in your area.https://www.fordraptorforum.com/threads/93-octane-tuning-results-75-whp-100-wtq-over-stock.73000/
I'd always recommend avoiding ethanol free gas as the ethanol adds good knock resistance to the fuel.
The OTS tunes are great, but if you'd be interested in a custom tune for your raptor check out our results below. The advantage of a custom tune is that we can tune for the fuel in your area.
https://www.fordraptorforum.com/threads/93-octane-tuning-results-75-whp-100-wtq-over-stock.73000/
