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Discussion Starter · #1 ·
Hi everyone, my xb recently started showing 250 miles to current tank and is reading 17 mpg.. I'm very concerned as it always starts with 308 and I avg roughly 24 mpg.. Any ideas? Nothing is new but as a precaution we changed out the spark plugs, it has a new air filter, in the new tank of gas we added Lucas due do what sounded like a misfire to the auto parts guy after selling me a new battery last week.. I have new tires since around February.

I don't know what else to evaluate. Suggestions please? Hubby is taking it to the dealership today and hopefully we get an answer other than it's fine.
 

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Do both of you guys have a heavy foot? Try working the crap out of the cruise control and avoid stop and go traffic. Just the basic things. I'm getting 28 mpg.
 

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Discussion Starter · #3 ·
Thanks for reminding me about that,..... We do nothing but hwy driving and we run the cc like it's going out of style. We have bad wind here causing the 24 mpg but on a nice drive out of town it's gotten 30+ mpg.

This just started after filling up the tank and seeing that weird reading. I was in progress of replacing the battery and I thought maybe after the recent need for a jump may have caused it. After the tech installed the battery and I cranked it, he heard it misfire and therefore recommended the fuel additive. I was also recommended a spark plug change so we did that.


It's been all the same since.. My trip meter does show 80 miles to 3/4 of the current tank so the range and inst mpg and avg mpg are way off.
 

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Hi everyone, my xb recently started showing 250 miles to current tank and is reading 17 mpg.. I'm very concerned as it always starts with 308 and I avg roughly 24 mpg.. Any ideas? Nothing is new but as a precaution we changed out the spark plugs, it has a new air filter, in the new tank of gas we added Lucas due do what sounded like a misfire to the auto parts guy after selling me a new battery last week.. I have new tires since around February.

I don't know what else to evaluate. Suggestions please? Hubby is taking it to the dealership today and hopefully we get an answer other than it's fine.
I hope you realize the computer readout of gas mileage is only loosely connected to your actual gas mileage. If you really care about your MPG, then start manually tracking it from fill-up to fill-up. It's a simple calculation of elapsed miles from last fill-up to current fill-up divided by the number of gallons to refill the tank (don't "top-off"). Then drive with a light throttle foot and a dedicated mind to reducing gas expenditure and you'll find out what your vehicle is actually capable of. Also, make sure your tire inflation is correct and use you cruise control whenever practical.
 
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