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80% power when new?

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Old Mar 8, 2016 | 07:53 AM
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80% power when new?

When I was test driving new trucks, one of the salesman told me the 6.2 only makes 80% of its power before 2k miles. Was this a line of B/S? I didn't buy the truck from them, I got a better deal at another dealer I've used for years. I didn't even sit inside this truck before I bought it. Truck feels very strong, to strong to be 80%.
 
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Old Mar 8, 2016 | 11:30 AM
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I have not noticed any difference in power but the fuel mileage improved greatly as it got some miles on it.
 
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Old Mar 8, 2016 | 11:54 AM
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Well that's good news. I think it uses gas sitting in the driveway right now! It is a struggle to get 12mpg. Last tank was 10.8 mpg. But, I didn't really expect much better.
 
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Old Mar 8, 2016 | 11:57 AM
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I have been tracking mpg on mine since day one. 21000 miles daily driver 11.5 in combo city/hwy. I am eventually going to tune it but been too busy to deal with it

PS the lie o meter always shows a mile or two better
 
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Old Mar 8, 2016 | 01:20 PM
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Just had mine tunned with Mikes 5 Star you will get another 1mpg.. Highest ive seen on highway at 65mph has been 16 at 70mph drops to 15mpg. city combo stays around 11.5 to 12mpg 4000 miles on truck now
 
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Old Mar 8, 2016 | 01:27 PM
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4,000 on mine too, all stock, 11.5mpg from day one.
 
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Old Mar 8, 2016 | 01:52 PM
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Originally Posted by Ron94150
When I was test driving new trucks, one of the salesman told me the 6.2 only makes 80% of its power before 2k miles. Was this a line of B/S? I didn't buy the truck from them, I got a better deal at another dealer I've used for years. I didn't even sit inside this truck before I bought it. Truck feels very strong, to strong to be 80%.
It's possible he was referring to the My Key function where it is possible to limit the top speed of the vehicle to 80 mph.
 
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Old Mar 8, 2016 | 01:53 PM
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Originally Posted by Ron94150
When I was test driving new trucks, one of the salesman told me the 6.2 only makes 80% of its power before 2k miles. Was this a line of B/S? I didn't buy the truck from them, I got a better deal at another dealer I've used for years. I didn't even sit inside this truck before I bought it. Truck feels very strong, to strong to be 80%.
It's possible he was referring to the My Key function where it is possible to limit the top speed of the vehicle to 80 mph.

My unmodified truck averages 13.8 mpg.
 
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Old Mar 8, 2016 | 05:45 PM
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Originally Posted by rays250
Just had mine tunned with Mikes 5 Star you will get another 1mpg.. Highest ive seen on highway at 65mph has been 16 at 70mph drops to 15mpg. city combo stays around 11.5 to 12mpg 4000 miles on truck now
What tune did you get? I lost about a mile per gallon. Running the daily tow tune. But the responsiveness is worth it.
 
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Old Mar 9, 2016 | 05:12 AM
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I got the daily 87 tune/tow.. I try to stay off the gas but it does feel good.
 
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Old Mar 9, 2016 | 08:11 AM
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Anyone had or heard of any warranty issues running the tuner?
 
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Old Nov 19, 2018 | 10:33 PM
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Recent trip running down the interstate. 2016 F350 crew cab dually long wheel base, 4x4, power stroke.
319 miles, 5 hrs, average 62 mph (plenty traffic), 19.6 mpg

Screensh
 
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Old Nov 20, 2018 | 05:45 AM
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Originally Posted by Ron94150
When I was test driving new trucks, one of the salesman told me the 6.2 only makes 80% of its power before 2k miles. Was this a line of B/S? I didn't buy the truck from them, I got a better deal at another dealer I've used for years. I didn't even sit inside this truck before I bought it. Truck feels very strong, to strong to be 80%.

Delete.....just realized this was an old thread
 
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Old Nov 20, 2018 | 12:26 PM
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it actually makes less than 80% below 2000 RPM. this should not be a surprise ...most modern engines target 3000/3500 for max power


 
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Old Nov 20, 2018 | 04:14 PM
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^where did that graph come from a GM website? 6.2 and the 5.0 make over 400hp
 
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