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-   -   What should my rpms be and why poor mpg (http://www.jeepforum.com/forum/f19/what-should-my-rpms-why-poor-mpg-1980098/)

Brycereuille 01-10-2014 03:12 AM

What should my rpms be and why poor mpg
 
Hey I have a 02 tj 4.0. All stock drive train on 33's .. I think my rpms are really high but to sure cause I'm new to jeeps. So roughly what should my rpms be like at 70 mph?? It's almost 3000. Is that right? Also what kind of fuel millage should I be getting. I know it a jeep and not a Prius, buy I don't think 10 mpg is right since it only has 85k miles. What do you think??

Evildriver-3 01-10-2014 11:36 AM

depends what gear you have for the final, but it sounds like 4.1 if you're not in od, if in od then its more

Brycereuille 01-10-2014 11:48 AM

Yes in just drive I'm running 3k at 65mph

MarkNog 01-10-2014 08:30 PM

Check out this nifty RPM calculator. It says: 4.10 gears + 1:1 trans ratio = 3000 @ 70

http://www.ringpinion.com/calculators/calc_rpm.aspx


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