I wonder how much mpg it costs letting the truck warm up for about 5-7 minutes before driving it?

 

Cool! I am now a professional!! (100 posts!!)

 

i let my truck run alot. sometimes at work when its cold i will let it run for a hour or more. and there are lots of times i get in and the gas guage has went down. but for 5-7 minutes it couldnt be to awful much. i mean i am sure it affects it a little.

congrats, mr. professional. lol

 

i let my truck warm up 15-20 mins b4 i go to work every minute mine never moves durin the time and on my lunch i let it idle for 30 mins never moves it couldnt be much im sure half a pop can every 15-30 mins i say? im just guessin

 

I bet hank is the person to ask. The thing is we know we use more gas in "Open-loop" if you get in and drive right away. I assume your 5-7 minutes may be more benificial from that stand point since your truck has a chance to warm up. I would say 10 minutes or more and you're probably wasting your gas. Just a guess

 

Thanks, I feel like I am in the big time now!! lol


The other day I let my truck warm up for about 5-7 minutes and the gas hand moved about a 1/16" or so. Maybe I have other problems. I noticed lately the gas mileage is dropping a little too. I figured it may be coming from where I let it warm up. Is there anything on these trucks that would cause it to run too rich?

 

O2 senors, clogged cat, plenum... many other reasons.

 

My truck warms up for 10 minutes every morning for work during this time of year. I went from average of 18 to 14MPG's.

 

I warm up in the AM and in the PM, each time just under 10mins (remote starter has a 10min timer). I lost only 1mpg, but not sure if thats just because of the winter fuel.

(13.5 city down to 12.5 city)

 

i saw a show on history channel for every hour of idle time is = to 6-7 miles of driving.