Curious like my user name.. lol

Those of you running a modified 6.0 or 6.2 gen IV engine what is your mpg now and what mods have you done? Also do you know the hp/tq?

 

2012 Sierra Denali AWD 6.2L with 4.10 gears, TSP 212/218 VVT cam, 1.75" Speed Engineering headers, self-tuned, 3/5 drop averages around 15mpg per the DIC, 10mpg when towing 7500lbs. I am sure it could get better with an mpg tune and conservative driving. No dyno or track times since its my daily and don't really care about numbers.

 

Nice. I might at some point swap in a 6.X in when my 5.3 decides its done and was wondering what people are getting I easily put 20k a year for just work commutes.

That's better than my current setup, 5.3L/6L80 4.56s with 33s avg 14mpg.

I have a lot of searching to do to determine which 6L to go with and goals for it since its a daily and thought this to be one way to start.

 

Lifted (6.5) on 35s since 2013, about 11 mpg with stock motor. The other one is all stock and has averaged 13.4 since new.

To put this in perspective, these trucks average about 90% city driving versus highway driving. The lifted truck gets about 14 mpg on the highway and the stock truck about 17 mpg running KO2s. It would be 19 mpg on Michelin Defenders.

 

02 2500HD with a 6.0. I have a 106 mile daily round trip commute. I did the math and figured out it was cheaper for me to buy a new hybrid that gets 64 mpg instead of continuing to pump gas into my paid off truck.

 

Excuse me sir but this is a Gen IV thread.

 

So when will the new car pay off? I can't imagine that a down payment, taxes, insurance, registration, monthly payments and maintenance are going to be less than what you'd spend on running the old girl for a few more years.

 

I did a spread sheet and with everything included it's about the same investment, except you have the extra vehicle to sell and recoup most of the costs. It just dosent save anything month to month, it only works if you can afford the costs untill you sell the extra vehicle. I'm going to buy a little work van, everything I own is tuned and doesn't like to pass stations. Lol.

 

I'm in a fortunate position and can send new inventory to dealers and tell them what I'm paying for it. I purchased the car for $19.5 out the door and should be able to sell it for ~$26k in 1 year. There was no down payment and I postponed my first payment for 3 months on a new car purchase so I'll only have 9 months paid when I trade it in for the next hybrid. 10.5 gallons now gets me 600+ miles down the street where 27 gallons got me around 360 miles. I rack up a minimum of 530 miles per week with zero personal errands or commuting outside of my daily work commute.

 

Well, there's also insurance to factor in. For me, something more important than money. I bought a truck to drive it because it is safer to operate than a car. The increased cost of fuel is the price of safety.

Until they redesigned their website a few years ago, the IIHS reported that after ten or so years there had not been a single fatality in my 2009 Yukon XL 4x4. The rate for my Sierras is very low while our little Kia was the deadliest in the country and indeed, that little car had been hit by others 3 times in 10 years.