If you put TOP GRADE FUEL (93 Octane - Super) or (98 Octane - RACING FUEL) into a Ford Expedition with a 5.4 Liter Triton V8 Engine...what would happen?
2007-01-07 14:42:28 · 17 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Ford
I don't think you can safely run racing fuel in that car. And from what I understand only the "luxury" cars need the top grade fuel in them. So you'd be wasting your money!
2007-01-07 14:50:54 · answer #1 · answered by fiestyredhead 6 · 0⤊ 3⤋
Nothing.
The octane rating represents RESISTANCE TO PRE-IGNITON or knocking.
That's it. It isn't the percentage of "magic horsepower forumla" in the gas like people think it is.
All high octane does is resist pre-ignition or knocking in performance engines.
NOTE: An engine designed to run on 93 octane will have LESS performance running on 87 octane. An engine designed to run on 87 octane will NOT have more performance running on 93 or 98 or anything else. Performance will be the same.
Use the octane recommended in your owners manual. Anything more than that will have no effect whatsoever for an unmodified engine. If you has a modified 5.4 with a turbo or supercharger etc. then you would probably need more octane, but in this case it makes no difference.
2007-01-07 14:51:59 · answer #2 · answered by Anonymous · 2⤊ 0⤋
The computer in your Expedition will adjust to the high octane fuel and most likely it wont run as smoothly as it normally does. Any gas over 87 octane isnt recommended as the octane number indicates its resistance to burning. High octane fuel is usually required in high compression engines and turbo or supercharged cars. Save your money and buy regular unleaded.
2007-01-07 14:52:23 · answer #3 · answered by legendlimestang 2 · 0⤊ 0⤋
You would be wasting a lot of money. Those vehicles are designed to run on 87 octane unleaded.The only reason to run higher octane is to prevent pre-ignition but that doesn't happen in most cars today because compression ratios aren't high enough to cause it and timing is all computer controlled anyway.
2007-01-10 05:07:11 · answer #4 · answered by mikey 6 · 0⤊ 0⤋
Not much. It will just burn up faster then the 89 or 87 octane. You might though feel It responds alittle better, like with acceleration.
2007-01-07 14:57:04 · answer #5 · answered by Anonymous · 0⤊ 2⤋
not much, honestly if you want better gas mileage and perforence, use the middle grade gas. I drive a lot with my 5.4 and I experimented and found the middle is the most cost effective
2007-01-07 15:19:54 · answer #6 · answered by Jeremy G 1 · 0⤊ 0⤋
Since the Expedition is not designed for turning high-RPM's, and lacks a high compression engine, you would be just pissing your money away.
2007-01-07 14:47:46 · answer #7 · answered by LovePinkPuffies 3 · 1⤊ 0⤋
RyRy is right I don't know how many times i've posted that same answer in short high compression high octane. Your exped. low compression. Get it?
2007-01-07 15:05:44 · answer #8 · answered by Anonymous · 0⤊ 0⤋
It will run exactly the same, because the cars PCM (engine computer) will sense the change in octane and adjust the fuel mixture so it will run exactly the same. HOPE THIS HELPS!!
2007-01-07 14:50:57 · answer #9 · answered by Jr. Mechanic 4 · 0⤊ 3⤋
That's a good question I hope you'll find reasonable answers
2016-08-23 14:39:32 · answer #10 · answered by Anonymous · 0⤊ 0⤋