Yes.

Much like it's owner, my Raptor only drinks the good stuff.

 

I've burned nothing but 87 since I got my truck, but yesterday I filled up with a load of 93. I have no way of proving this, but, was that a feeling of a bit more quickness I was feeling?:str:I'm checking the mpg on this tankfull.
Reddog...

 

I've burned nothing but 87 since I got my truck, but yesterday I filled up with a load of 93. I have no way of proving this, but, was that a feeling of a bit more quickness I was feeling?:str:I'm checking the mpg on this tankfull.
Reddog...

Huge power difference from 87 to 93. I dont recommend using it all the time but if you really want to haul ass put 10 gal of 93 in and a bottle of octane booster.

 

What about mixing 93 oct and E85.
Isn't E85 around 100 to 105 oct?

 

The 5.4 being an E85 motor will make a bit more power as the engine can detect the higher octane (If I understand how it works correctly). Originally Ford had said the 6.2 makes 411 on regular, making it the most powerful truck to run on regular. I know on the Chevy's 6.2 you have to run premium to make more power.

 

So can anybody confirm whether the truck makes the 411 on 87 or if it takes 93 to get it. I too thought that Ford had claimed it got those numbers on regular.

 

So can anybody confirm whether the truck makes the 411 on 87 or if it takes 93 to get it. I too thought that Ford had claimed it got those numbers on regular.

See, I thought this as well, and had been saying all along it was on 87oct. The PIckuptrucks.com article did not have that disclaimer at first, and I'm not sure why or when they added it. HPE dynoed theirs as well on 87 I believe, but had lower numbers than the magazine got. I chalked it up to the varience between two dynos. Maybe there is indeed a difference and th timing adjusts for it.

 

What about mixing 93 oct and E85.
Isn't E85 around 100 to 105 oct?

Oh, and the 6.2 is not e85 capable. It could damage the fuel system in the longrun if you ran e85 in it.

 

From the past posts it looks like if you have a 5.4 and mix 93 octane fuel and E85 100~106 octane you would get some power!!! With the Flowmaster I just installed I will prolly get 25mph!!!

LOL

mattbcnv

the 5.4 Raptor..... it will pass anything on the highway, execpt a gas station!!

 

I dunno if a 10hp increase in a 411 hp motor is really gonna be that noticeable. I ran the premium program on my hypertech with my 5.4 and it didnt really seem to be any different than the regular. Maybe there was a slight difference but it wasnt really worth paying the extra cash for it.

 

Did this topic ever get resolved? All the latest magazine reviews pretty much say that the 6.2 requires premium to achieve the 411 HP. But my owners manual pretty clearly says 87 octane for both the 5.4 and 6.2.

Did anyone pose this question during one of the SVT chats?

James

 

Looks like PUTC added an edit to their Raptor 6.2 dyno #'s....



So maybe there IS a difference between the two. I have gone on record that the 411 was on 87 octane (time to start eating crow), but I apparently was incorrect. 93 octane is needed for 411HP. Now the question is, is the added cost worth the 10HP?:4-dontknow:

Yes there is, only common sense.
More energy == more power and that == better gas mileage.

I am now seeing my meter increase, after putting higher octane in and opening it up on the highway.
Btw, E85 can't have 100+ octane, as it burns less effecient and has less power.

 

Btw, E85 can't have 100+ octane, as it burns less effecient and has less power.

Yes and no, E85 does burn less efficient but does have higher octane. The higher octane does provide a higher horsepower.

"Ethanol has less energy content than gasoline. However, E85 also has a much higher octane (ranging from 96 to 105) than gasoline. FFVs are not optimized to E85, so they experience a 10-15% drop in fuel economy...Research indicates Ford FFVs experience a 5% horsepower gain on E85."

-E85 faqs from E85fuel.com

On a side note, during winter months E85 is actually closer to E70 to help with cold starts. Also, research has shown than E20-E30 blend type fuels show better fuel economy in some vehicles to include the FFVs.

All of these statements are pulled from actual creditable research (not Wiki).

 

More research - dispelling myths.

It is true that a vehicle does require more E85 than regular gas since the amount of energy per unit of ethanol is less than that of gas. Ethanol has a lower ignition temperature so the engine overall will run cooler increasing power. It also burns slower so instead of just burning out in one violent explosion forcing the piston down, it continues to burn the entire length of the piston stroke expanding gases more evenly and smoothly. So running E85 will give any engine more power over any pump gas. Also E85 is 105 octane. Gas comes in 85, 89 and 91 octane. The 105 octane of E85 will help to eliminate knocks and pings. All of these benefits will make an engine run smoother and quieter.

 

The common misconception is that the higher the octane rating, the more horsepower produced from the fuel. Octane rating is simply the fuel's resistance to premature detonation upon compression in the cylinder.

Motors requiring higher octane fuel get their horsepower from a higher compression ratio and closer timing tolerance - close enough that the less stable 87 octane fuel will tend to light-off before the the piston stroke passes top-dead-center... This usually ends up with the the piston trying to go backward rather than forward - which is very inefficient (and sorta detrimental to the drive train :^D )

This is why "octane-boost" additives work with cheap gas... You aren't adding any magic "go-fast" to the fuel - you're actually calming the cheap fuel down a bit so the engine can operate effectively... the gain in horsepower coming from all cylinders firing forward rather than fighting the occasional backward-fire "ping".

It's probably also a good time to note that 87 octane gasoline is *not* labeled "premium" for a reason - premium fuel has additional detergents to keep your engine clean - which translates to a happier Raptor over a longer period of time.

So - it all boils down to how you use it and price-point...

If all you do is commute/tool around town - 87 with an occasional tank or two of premium to 'clean the pipes" will probably do you fine. But if you can afford the extra $0.10 a gallon per octane hop (in my neck of the woods), and/or regularly run under increased load (hills, hauling, romping) - the $2.60 or $5.20 investment per tankful would be worth it...

 

I was under the impression that if you put prem. in a vehicle thats supposed to take reg. you might burn the valves or something...........:4-dontknow:

 

If an engine is designed for premium, it will run more efficiently when using it. Before the days of computer controlled timing, it could actually damage the engine. Now, engines are smart enough to compensate for the cheaper fuels. When you put the cheap stuff in, given you drive exactly the same way, it will just end up using more of it and there goes your cost "cutting" tactic. If your too cheap to put premium fuel in, don't buy an engine thats designed for it. This isn't necessarily the case with the 6.2L and since every engine reacts differently, do your self a favor and keep track of how much fuel your using. One month (or 4+ tanks depending on how much your drive) use only premium, then the next only regular and see what you get.

 

But is the 6.2 designed to get 411 HP with premium or 87 octane?

 

But is the 6.2 designed to get 411 HP with premium or 87 octane?

That is a good question and I would like to know as well.

Thanks

 

411 with premium, 401 on regular.

 

That's what the magazines are saying, but where did they get the info? My owners manual only shows reference to 87 octane. And on the new 5.0 mustang, they clearly call out premium is required for 412 HP rating... So you'd think they would need to do something like that on the 6.2 if that were the case...

Anyway, that's why I have bumped this thread. Seems like one magazine quoted a 10 HP drop on 87 and everyone else jumped on it since I haven't seen any literature from Ford saying premium is required for the 411 HP...

 

The common misconception is that the higher the octane rating, the more horsepower produced from the fuel. Octane rating is simply the fuel's resistance to premature detonation upon compression in the cylinder.

Motors requiring higher octane fuel get their horsepower from a higher compression ratio and closer timing tolerance - close enough that the less stable 87 octane fuel will tend to light-off before the the piston stroke passes top-dead-center... This usually ends up with the the piston trying to go backward rather than forward - which is very inefficient (and sorta detrimental to the drive train :^D )

This is why "octane-boost" additives work with cheap gas... You aren't adding any magic "go-fast" to the fuel - you're actually calming the cheap fuel down a bit so the engine can operate effectively... the gain in horsepower coming from all cylinders firing forward rather than fighting the occasional backward-fire "ping".

It's probably also a good time to note that 87 octane gasoline is *not* labeled "premium" for a reason - premium fuel has additional detergents to keep your engine clean - which translates to a happier Raptor over a longer period of time.

So - it all boils down to how you use it and price-point...

If all you do is commute/tool around town - 87 with an occasional tank or two of premium to 'clean the pipes" will probably do you fine. But if you can afford the extra $0.10 a gallon per octane hop (in my neck of the woods), and/or regularly run under increased load (hills, hauling, romping) - the $2.60 or $5.20 investment per tankful would be worth it...

Man, great explanation. Thanks! Now if we could just answer the HP question. <G> Rep point your way..

Red

 

Motortrend also referenced it in their article as well and I thought PUTC verifed it on the dyno? But I did read it elswhere that there is a 10hp drop on 87oct.

 

Power ratings with Regular and Premium

401 hp is with regular gasoline
411 hp is with premium gasoline

The engine will run wonderfully on either fuel, without knocking (due to dual knock sensors, and adaptive knock control algorithms) but makes most power on premium.

Don't run E85. The fuel delivery module in the tank is incompatible with this type of fuel, and does not have the flow capacity (you need a higher fuel flow because of the lower energy content) so you will run the engine lean and could potentially burn a hole in the piston.

 

Hmm. That's what I keep hearing. Wonder why there is nothing in the owners manual about using Premium for max horsepower? Seems like a huge oversight if it is true...

P.S. I've heard light pinging while running 87 under heavy throttle up a hill... so, the timing must be getting retarded. So that lends some credibility that premium will allow the timing to remain/advance...