Fuel Grade for F250 V10

Use what's printed on the inside of the filler door. 87 octane is what I ran in mine before I chipped it and did intake/exhaust mods at

Higher octane won't do jack for performance on a stock engine. It WILL suck money out of your wallet at a faster rate tho.

On the other hand, at todays prices, a few cents more for 91 doesn't hurt the wallet that much more. You'd think they'd throw in some vaseline, though.

Had to gas up 2 vehicles yesterday. Grand total gas purchase $126. Ouch.

"The OTHER Kev>

This is a good point about higher octane being "relatively cheaper" now - instead of the 10 cent increase for high test reflecting say an 8 percent increase in gas cost, its now more like a 3 percent increase. Interestingly, I heard a news report that said consumers are buying less of higher octane gas, and more low octane, with the price increases. And, if you want to cry for me, I literally coasted into a gas station the other day with my F350 super duty (gas gauge read 1/4 tank but it was off - any way to adjust this?) and filled up with 35 plus gallons of gas for about $105.00! Even the gas attendant was breathless.

John

Ouch! I'm not driving my truck much right now, but since I was out and about in it the other day, I stopped at 7-11 and put $15 in it. The needle on the gauge barely moved. While I felt pretty silly only putting 5 gallons in it, I had to laugh when I pulled up to the pump and saw the last person there had put $5 worth in their tank.

Oh, and I've never used anything other than 87 octane in my truck and see no reason to switch now.

Matt

Hey Matt - you have the same model and truck I have. Mine is a dually with a dump bed on it. What is your mileage? I'm getting 5 MPG, but I am doing short hauls with heavy loads. Also, I've only had this truck for a few months and although I went through the brake system, the brakes seem to require an extraordinary amount of pressure when braking hard. What is yours like?

Thanks

John

Filled up the 350 yesterday with 91 octane. $108.. Ouch! Even the bike now costs double digits to fill...

Gas was $1.07 when I bought my truck in '01. It's more than tripled in 4 years..

Bro-in-law got back from Iraq a few weeks ago. He said gas sells for about a nickel a gallon oer there.. Must be nice...

Yeah, but I wonder what a gallon of Jack Daniel's Black would cost 'em?

Razor

Been using 87 Octane since day one and pulling a 14,000 lb 5th wheel. No problems at all. A Banks Power Pac is installed.

You can experiment with higher Octane's and draw your own conclusions. But, you are OK with 87.

'99 F350 CC 4x4 V10.

Yeah, ain't that a bitch! Shortly after I bought my truck, gas hit a low of under $1 a gallon in N. Mass. In fact, a town I commuted through was having a gas war and it hung down around 89 cents for a month or two. Back then, I didn't mind my 65 mile a day commute in it.

Luckily things have changed and I don't need the truck as a daily driver and I have no commute. I'd be really crying if I did.

Matt

I was doing about 45 miles each way in my truck for about 2 years. Cost more to feed the beast than the monthly payments were...

Thankfully I work about a mile and a half from home so if it's a nice day, I'll walk. Unless I've got a lot of stuff to haul or kids to tote around, I ride the bike everywhere..

From past comparisons, I'm already getting about the best mileage of anyone on here with a V-10.

I'm good, thanks.

Matt

Bullshit.

It's kinda FOOLISH to waste your money on more expensive fuel that does absolutely NOTHING for you except cost you more money. What the hell is "runs noticeably better"?

Do you actually understand what a fuel octane rating is and what it means in real world application? The only way you could possibly see any benefit whatsoever from higher octane fuel is if you had a high enough compression ratio to cause PRE IGNITION with the lower 87 octane fuel. All most no cars or trucks today do. And Fords 9.2/1 compression ratio V-10 does not require high(er) octane fuel.

To bad you are off in Usenet land, because if it were feasible, I would bet you the title to your car against it's value in cash, that on a dyno there would BE ABSOLUTELY NO BENEFIT from using a higher octane fuel over the base

Do you use deer whistles too?

I used to run 89 in my cars because I was getting better mileage, more power, etc., until I bought my 2002 Escape. I had a '89 Probe and a 2000 Eclipse that both got better mileage with 89, and I had the mileage documentation to prove it. They were both 4 cylinders. Then I bought the Escape (V6) and tried 89 in it for the first year or so. Then one day I stopped at my usual watering hole and they were out of 89, so I put in 87. Didn't notice any difference in power or performance after the first tankful, so I tried another. Same mileage as the 89, but cheaper. I've been running 87 ever since. I don't do a lot of heavy loads, but it's hot here 9 months out of the year, and I've noticed no degradation in performance or mileage. I'm not saying 87 or 89 or even 93 octane is right for everyone because blanket statements ARE kinda foolish, but it doesn't hurt to try different grades and manufacturers to see what's best for you.

SC Tom