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These are two of my personal records for avg mpg and distance. The cruze I drive is more then capable of higher mpg avgs unfortunately I am limited by my terrain. I have 2500ft climb over 20 miles from 3000ft elevation to 5500ft which obviously is a disadvantage because I spend more fuel climbing the mountain then I save coming back down it. The rest of the terrain is flat and im able to maintain equal distance speeds of 63 and 53mph for a 58mph avg over the 625 miles. This spring and summer I should be able to average these same numbers between 56 and 59mpg on a daily basis over 350 miles. I think a 60 mpg avg is my limit for this route but definitely not the limit for the cruze eco. Phillips/Conoco 87 non ethanol only, Mobil1 extended perfomance, 40-41psi, 112k miles and 6th gear all the way.

The cruze I drive after all these miles in terms of the engine I can just feel how smooth and well oiled this machine has become. The engine I feel has really started to operate at such an efficient level and I think its better now after all these miles. Hopefully and I have my fingers crossed the engine will be able to maintain this optimal or peak performance another couple hundred thousand miles. As far as the transmission once the oil has a chance to warm up the shifting is very fluid.

Im not posting this for show I drive the same eco as everyone else instead im posting it for tell.



 

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My engine is still breaking in (1,658 miles) but my best 50 mile stretch so far has been 47mpg according to the DIC.

I will try to set personal bests in tank averages and 50 mile trip on the upcoming road trips to Lordstown Ohio.

I already had my first oil change @ 1,250 miles | [email protected] psi cold | Shell 93 Octane | Spark Plugs .035 | Resonator Bypass

Which transmission oil do you use?
 

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Discussion Starter · #3 · (Edited)
I replaced my transmission oil @ 105k with factory fill. A few bits and flakes but overall the oil was brown which is normal and healthy. I plan on making a routine of replacing the fluid every 50k. I also plan on using a magnetic transmission plug. I allready replaced my engine oil plug with a magnetic plug.

 

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The cruze I drive is more then capable of higher mpg avgs unfortunately I am limited by my terrain. I have 2500ft climb over 20 miles from 3000ft elevation to 5500ft which obviously is a disadvantage because I spend more fuel climbing the mountain then I save coming back down it.
I think you are closer to the limits of how good the cruze eco/manual MPG is than you think. From what I have seen you are correct you will loose more MPG up hills than you gain coming down the back side of a hill, but its not an extreme amount of difference.

On a 500ft hill with equal proportions it's less than 1/2mile per gallon difference, usually I can remain extra easy on it for a few miles past the grade to gain back all I lost.
 

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I don't know what my actual MPG was, but I averaged over 50 MPG for over 1,000 miles last June running at 55-65 MPG on an out & back route. I agree with spacedout that you are close to the ECO MT's theoretical maximum fuel economy, but I'm hoping you prove the two of us are wrong.
 
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