Ditto ozx3+1's comment. Coolant loss of that amount (assuming it was full to begin with, and also remember "full" is now considered the "min" line) is a definite red flag. Get it checked to be safe.

Amp

 

Is it gonna hurt? and how bad?

I'm booked in for Wednesday next week, I'll let ya know what BS story they give me.

 

Don't forget to roll-back to stock tune before you take it in... Your truck is an 07? You're likely under the 3/36 still. It may not hurt a bit. If not, it'll cost you a Benjamin. The only bill that's not a dead president...

 

I've been running stock for the last month since ice and snow + HP = outta control.

I had it in two weeks ago to get the drive line service done (transmission, fercase and diffs) I forgot how crappy the fuel mileage is stock (15mpg) Tow/Economy (22mpg) these are 1 week averages and in some cases I've gotten 24mpg on a single day.
(Sorry - Just bragging).

 

Imperial gallons??

 

$100.00, US

 

Sorry - I was in a hurry.

I was wondering about Kusto's mpg numbers (Imperial or US gallons). 24 mpg would be absolutely amazing if US gallons. Still GREAT if imperial (equal to 20 mpg US).

 

Either way you look at it: funny &/or amazing!

 

I know it does sound like something is goofy don't it. The numbers I quoted are imperial gallons (which is larger than a US gallon) 1 Imperial gallon = 1.201 U.S. gallons. I did not believe the lie-o-meter so I did hand calcs on a number of different trips one of which was 2400Km and the other that was 1900Km as well as various shorter trips. Of course I was shocked to find that the had calc produced slightly higher numbers than the lie-o-meter. I've even used a GPS to confirm accurate distance in order to calculate the correct mileage. Also note that most of my travel time is with a Kawasaki 750 ATV (635lbs) in the bed of the truck.

I put on an average of 250Km/day 5 days a week, so I have plenty of opportunity to check the numbers. This is with the tire correction at 600 revs/mile (as close as I can adjust the tire size to 35" tires, confirmed diff gear ratio, and I need to maintain 2050 to 2150rpm on the highway (130km/h) otherwise the mileage will fall off faster or slower, that is the sweet spot for the best economy. This is no word of a lie or embellishment on the truth. A buddy of mine is right upset because his (exact same everything - except he has cold air intake) is consistently 5-6mpg lower than mine on the same roads at the same time going to same location.

One of my buddies that came with me on one of the trips even commented, if it keeps going this way soon I'll be making fuel.

 

Well, just got the diagnosis today....Head gaskets....Will be done by tomorrow afternoon...now is that service or what.

 

Have them check the heads for flatness, etc... There's a possibility that they aren't as true as the need to be.