Worse MPG after break in?
#1
Worse MPG after break in?
I've been wondering about this for some time. When I first got my truck I was averaging 18 mpg with mixed driving (60-70% Highway and 30-40 city) now that I am 20,000 miles in my mpg has dropped to about 15 give or take .5 mpg either direction. Has anyone else experienced this?
#3
I don't think so because I bought my truck in December of 2005, so it was winter when I got it and was getting 18 mpg during the winter. Is all fuel blended during the winter across the US? I hear a lot of people saying that winter gas is worse but I've never heard anyone say that down here. I just changed my fuel filter and air filter so if my mileage goes back up, I may have to change those two more frequently.
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Originally Posted by cskrmetti
I wonder what the root of this is? Carbon buildup, clogged fuel injectors, or what?
Seems like I remember getting 400 miles to the tank on a regular basis. But now, I only get maybe 300-330. I should be thankful though..... 200,000 miles, and who knows how many engine hours, it's a wonder it even runs.
#7
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#9
Originally Posted by Lumadar
And besides, I believe these engines are more commonly referred to as "broken in" around 10k miles.
Originally Posted by Klitch
lol man im right behind you there, 184k on my 4.6, the mileage sucks, the power sucks... but the pile will fire up and run fine every day.
#10
You know what really sucks? I don't drive very hard. I can count on one hand the amount of times that the gas pedal has met the floor. Typically I find that my city and highway mileage is about the same. I guess driving at 80 mph is just as bad as stop and go as far a mpg but better on wear and tear. I have the 3.55 rear end too. I would hate to see if I had 4.10 instead. Maybe if I get an edge programmer I would know what was really going on. I would prefer a xcal2 but as of right now it looks like I will get neither. I've got a baby on the way, and I don't think the wife would take to kindly to my purchase of either. I might have to sell off some things that I don't use like say my golf clubs, electric and acoustic guitar, or my gary fisher mountain bike, just to name a few.
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bah... so much speculation. Modern engines have vertually no break in period. Familiarity is why your truck is getting worse milage. Your comfortable with it and you drive it like a friend now. That uses gas. I have 2300 miles on mine and keep looking at the MPG part of the cluster.... just give me a year... I will forget that and it will be driven like I like to feel. BTW... a clogged fuel filter will NOT make your milage worse. nor an oil filter. It is strictly peddel depresion and quality of fuel used. these are heavy trucks and not bought for fuel milage concerns.. to a point. I like seeing the 16 mpg I get back and forth to work... not like my focus that gets 30-35 on the same route... talk about culture shock!! One thing I noticed that seemed to help... at about 42 MPH the torque converter locks. So I get to that speed reasonably fast and then let off the gas so the converter locks... then slowly accelerate to the speed limit and I feel it helps with milage. I might be all washed up.. but it seems to help to lock the converter sooner than later.