The 5.0 runs on E85. I know on the chevy 5.3 E85 the hp went up about 20 hp. Is the 5.0 400hp on regular gas and if so what does the 5.0 do on E85 stock?

 

I always thought E85 corroded lines?

 

With the proper fuel lines there is no problem with corrosion. I have a 07 Silverado that came from the factory to run on E85 and that is the only fuel I use. No problems.

 

I believe the issues stem from a system that has 'regular' fuel ran thru it for its entire lifetime. If you choose to randomly run E85 after years of normal usage problems occur because of the high detergency of the ethanol. It cleans all the deposits off the walls of EVERYTHING. In the process it plugs fuel filers and can cause problems when the filters start plugging up and overheating the pump follows. Best bet if your one of these guys, change your filters if in doubt.

 

Aslong as your 5.0 is a "flex fuel", you won't have any problem. Obviously, since you're in the 14th gen forum, your truck is pretty new.
Yes, you will pick up some more HP, especially if you've been running like 87 octane. Even you've been using 93 octane, you'll notice a difference.
I run both 93, ad/or E85 depending on the price difference. I figure if E85 is 25% cheaper, that's close to the break point of mileage versus performance. E85 you'll get about 25% less mileage. The figure is actually 28%, but I'm olde, and figuring 25% in my head is easier.

 

Per Ford OBDII Doc index pages on Flex fuel use, last published for 2019 model year.
Power increase can be up to 4%.
Fuel system is designed to run up to E85 Ethanol fuels only, no Methanol.
Fuel lines and hardware are internally plated. (from another source)
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Running full E85 can bring starting and drivability issues in winter and cold weather.
There are re-fueling requirement that should be understood by the owner as described in the Owner manual.
The reason for this is how the PCM arrives at the Eth concentration of fuel mixed with E 10 or when interchanging the fuels. These engines have no fuel detection sensor to provide the mix concentration, any faster. The PCM does it all by program inference from a number if data sources to arrive at a value and stored in a Register. This make it slower to arrive at the final value.
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There is no use in guessing otherwise !
It does not often pay to run full E85 on the street because Octane rating well over 91 is reached at lower content ratios mixed with E10 of lower Octane rated gas.
To see this, find an on line Ethanol Fuel calculator and plug in the values to see the results. You can see it does not take much E85 mixed with E10 87 to get to 100 Octane fuel rating by volume in a fuel tank. For example: roughly 3/4 tank E10-87 with 1/4 E85 gets near 100 Octane rated fuel mix. The actual effective E rating lowers from the mixing but remains well over 30 by volume mixed.
Remember, both fuels both are mixed with Ethanol. Only the Gasoline content is reduced as the Eth increases.
In this case the actual Octane rating of the >Gasoline content< make little difference.
Major Octane rating then become that of the Ethanol.
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I run a mix of E10-87 at 3/4 tank level with fills of E85 at the 1/4 level from the full mark.. Have no issue starting, running, is smooth and tends to get better fuel mileage and throttle response is quite sharp. . The problem is keeping the ratio by alternating the fill with E10-87 as the fuel is used up.
Only way is to install a sensor in the fuel line feed and Gauge in the Cab to see what you have after just time allowed for mixing in the tank.
Lower fuel costs may be the benefit as well as better fuel mileage and performance by playing the fuel game from both ends of the Eth concentration range.
At high or E85 fuel levels, oil change interval should be a consideration because the unburned Eth tends to wash lube oil from the cylinders a bit faster.
This is not in any manual but my experience running Alcohol fueled race engine where lube, oil type, and change intervals, are an important factor.

 

I have been running in my 18 GMC about 3 years ago since where i live it is a dollar cheaper than 87. I use it year round with no problems and more power. I average about 2mpg less than 87. The GMC does have the sensor and it does tell you alcohol content real time. I put the sensor in since my 6.2 didn't come with E85 but all the wiring was there and the fuel line are the same. The only thing is when it is cold out it does take longer to crank before starting. I have used it in 0 degree weather with no problem.

 

not for decades.

after they started putting ethanol in standard gas, fuel components in cars adjusted so its safe.