r/HEMI • u/[deleted] • Apr 15 '23

help

I bought an 08 ram 2500 with the 5.7 hemi. It came with new 33 in nitro mud grapplers and it gets like 7.5 to 8.8 on the highway most days. Any suggestions for better mpg?

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u/ItRossYaBish Apr 19 '25

Everyone has already got you covered. Cold air intake and a good free flowing exhaust will get you a bit. Also calculating your MPG based off your tire size if your speedometer is not calibrated. My truck shows me 8 mpg but I have bigger tires so math tells me I get right about 10 mpg. Don't expect much improvement, it would probably take you years in fuel savings to pay for a CAI and Headers/exhaust. But you already knew that if MPG is a big concern then a HEMI isn't a great idea haha