[Childs Play]

Originally Posted by outobie

How does E85 effect MPG?

I bought the 2.0t for a commuter so fuel mileage is important to me.

If you're worried about MPG, E85 isn't for you. You'll see from 15-25% less MPG. It costs less but that price usually doesn't make it cost efficient in most cases.

[Martinjlm]

Originally Posted by outobie

How does E85 effect MPG?

I bought the 2.0t for a commuter so fuel mileage is important to me.

Originally Posted by Childs Play

If you're worried about MPG, E85 isn't for you. You'll see from 15-25% less MPG. It costs less but that price usually doesn't make it cost efficient in most cases.

Unless you're comparing it to Premium. In Detroit, E85 currently sells for @ $1.99 Regular is $2.50 - 2.60, so about a 30% difference. 93 Octane sells for between $3.09 - 3.40, so a 50 - 65% difference against 25% less mpg. You use more E85, but spend less money for the same miles driven.

Better make certain the 2.0T hard parts are tested for E85. The V8 is, but I'm not certain about the 2.0T.

[Bluecyclone]

This is a very informative thread, the reason I post here, thank's to all who contributed.

[Childs Play]

Originally Posted by Martinjlm

Unless you're comparing it to Premium. In Detroit, E85 currently sells for @ $1.99 Regular is $2.50 - 2.60, so about a 30% difference. 93 Octane sells for between $3.09 - 3.40, so a 50 - 65% difference against 25% less mpg. You use more E85, but spend less money for the same miles driven.

Better make certain the 2.0T hard parts are tested for E85. The V8 is, but I'm not certain about the 2.0T.

Ah. True in different areas it probably comes out ahead. Here E85 is around $1.80-$1.99 a gallon while I can get regular for ~$2.06 a gallon currently.

Doesn't work out here. Now for premium it does but I don't think the 4 banger requires premium and that's what I was referring to specifically.

[z28pat]

Lots of great info here about the e85, my question relates to the car’s warranty if you choose to run e85, how is it affected or is it voided ?

[Childs Play]

Originally Posted by z28pat

Lots of great info here about the e85, my question relates to the car’s warranty if you choose to run e85, how is it affected or is it voided ?

If you tune the car, you can pretty much kiss the warranty on your engine (and most likely all powertrain) goodbye.

[KingLT1]

Originally Posted by Martinjlm

You are right. I meant to say fuel SENSOR but typed fuel FILTER. As far as the fuel pump is concerned, I spoke to the Chief Engineer for Small Block Engines a while ago about E85 in Camaros. After first stating that he doesn’t recommend it, he did confirm that the parts of the engine (valves, and valve seats as example) that need to be hardened are already hardened because trucks use E85 and are by far the most volume of Small Block engines. He also stated that the fuel pump should be changed because of the differences in fluid density between E10 and E85. He did not say you COULDN’T do it with the stock fuel pump, but that there would less likely be a problem if you did get the correct fuel pump.

So called engineer is just covering his arse...go ahead and link this post to him. The LT1 fuel system components are more then capable. The fuel pump is capable of supporting over 500whp NA with E85. This has been documented and dyno proven. 25whp gains running e85 on this engine.

[Mr. Wyndham]

Originally Posted by KingLT1

So called engineer is just covering his arse...go ahead and link this post to him. The LT1 fuel system components are more then capable. The fuel pump is capable of supporting over 500whp NA with E85. This has been documented and dyno proven. 25whp gains running e85 on this engine.

You're right - but many components are engineered to exceed the intended load/application in order to better guarantee their performance and longevity. And that is just the way they think...

For example, back when they were warranting cars for 100,000 miles; most of GM's suspension longevity testing is upwards of 300,000 miles of service.

[greaser2]

Bingo space

[Martinjlm]

Originally Posted by KingLT1

So called engineer is just covering his arse...go ahead and link this post to him. The LT1 fuel system components are more then capable. The fuel pump is capable of supporting over 500whp NA with E85. This has been documented and dyno proven. 25whp gains running e85 on this engine.

I can assure you he is not covering his ass. I'm choosing not to name drop, but he is THE chief engineer. I never said anything about injectors or other fuel system components because I know they are capable. My question to him was specifically about fuel sensor and fuel pump. He very specifically said the fuel sensor would need to be changed and strongly recommended changing the fuel pump. He did not say that the stock pump wouldn't work. He did say that because it would need to flow more fuel and that the specific density of E85 is different than the specific density of 93 octane, there could be issues. Not would...could. Just because something works on a dyno does not speak to its durability, unless you are running it hundreds of hours on the dyno.

[KingLT1]

Originally Posted by Martinjlm

I can assure you he is not covering his ass. I'm choosing not to name drop, but he is THE chief engineer. I never said anything about injectors or other fuel system components because I know they are capable. My question to him was specifically about fuel sensor and fuel pump. He very specifically said the fuel sensor would need to be changed and strongly recommended changing the fuel pump. He did not say that the stock pump wouldn't work. He did say that because it would need to flow more fuel and that the specific density of E85 is different than the specific density of 93 octane, there could be issues. Not would...could. Just because something works on a dyno does not speak to its durability, unless you are running it hundreds of hours on the dyno.

No "fuel sensor" gets changed,...you have to ADD the GM flex fuel sensor in line before the fuel rail. Several companies make kits using OEM components that are pretty much Plug-n-Play. I already said the stock fuel system including the "FUEL PUMPS"(The LT1 has 2 fuel pumps. One in-tank and the other driven off the cam shaft.) have been proven to flow enough to support over 500 whp NA with E85. Aside from that E85 is not going to compromise either fuel pump. Several companies have spent countless hours dyno testing and street testing E85 with the LT1.

[Martinjlm]

Originally Posted by KingLT1

No "fuel sensor" gets changed,...you have to ADD the GM flex fuel sensor in line before the fuel rail. Several companies make kits using OEM components that are pretty much Plug-n-Play. I already said the stock fuel system including the "FUEL PUMPS"(The LT1 has 2 fuel pumps. One in-tank and the other driven off the cam shaft.) have been proven to flow enough to support over 500 whp NA with E85. Aside from that E85 is not going to compromise either fuel pump. Several companies have spent countless hours dyno testing and street testing E85 with the LT1.

Fine....you're right. My guy doesn't know what he's talking about.

[Childs Play]

Originally Posted by Martinjlm

Fine....you're right. My guy doesn't know what he's talking about.

Right? The engineers that design the car don't know anything. Joe Blow on the internet said so and he knows more than the chief engineer.

I always like people that think they know more than the people that build and design the car.

[KingLT1]

Originally Posted by Martinjlm

Fine....you're right. My guy doesn't know what he's talking about.

If you actually understood what is going on under the hood of these cars then you would not be arguing with me. "change fuel sensor" and "fuel pump". There is no fuel sensor on the LT1 from the factory and there is more than one fuel pump. So nothing you are reciting from "you're guy" makes much sense. Again he is just covering his arse...No GM engineer is going to say "hey go ahead and mod the piss out of your new car and void the warranty". Lol