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Highway mileage is dreadful!

3818 Views 22 Replies 19 Participants Last post by  Black1
My Ram is new, about 1,200 miles and today I did the first real hwy trip. I filled it at 7-11 with 87 octane and got on the highway. I drove 175 miles, all interstate at about 75 mph, a little less for a while and little more for a while, never over 80 mph. We got to our destination, did about 5 miles in town and headed back home. About 30 miles from home, the gas light comes on. I found a station and fill it up. 23.62 gallons and 335.5 miles equals 14.2 mpg! My window sticker says 19! How could it be so bad? I should claim fraud by Dodge!
I used cruise control almost exclusively, never flooring it. No A/C on. WTF?
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Mine easily gets 18 at 75mph. My best ever trip is 20.6 cruising at 60mph. It will improve with some miles and 89 octane will probably pay for itself and make you're truk run better too.
 
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