Grade of Gas for V10?

[JamesDC]

Which grade of gas is everyone running in their V10?

Will these run well on regular or do they need the higher octane?

Has anyone tried both and noted differences in power or milage?

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Thinking of getting F250SD SC 4x4 V10

[pcasciola]

I mostly use 89 now. I've tried everything from 87 to 96 (Sunoco 94 + octane boost). I got a little bit of engine ping with the 87, so I try to avoid using that, although the manual says a little engine ping is normal, and not harmful to the engine. 89 and up all seem about the same as far as fuel mileage and engine ping are concerned. I tried the various octane ratings to see if it would make the dreaded exhaust flutter go away (and to make sure it wasn't detonation), but it didn't make any difference.


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Philip Casciola
'00 F350 Lariat V10 4x4 Crew Cab LWB DRW
Bone stock so far....

[Fritzmaster]

My V10 runs great on 87 octane gas. Tried 89 and 92 octane from several oil companies, but it made no difference that I could tell other than cost. I did get some bad 87 that resulted in some pinging, but that was a one time occurance.

[V10 Rocks]

Use 87 octane, anything above that and you are wasting money. As matter fact running a higher octane can cause damage, higher octane burns slower causing carbon build up on valves, pistions and heads; unless the engine in question has been modified. The need for higher octane is based on how much compression a given engine has. The higher the compression the higher the octane needed. Follow the owners manual. If your stock V8 or V10 is pinging have it checked out.

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'00 F-250 CC Shorty Lariat 4x4, V10, Auto, 3.73 L. Slip, 40/20/40 Bench, Off-Road/Camper Pkg/Class IV Hitch, Manual Hubs, Roof Clearance Lights, Pwr Trailer Tow Mirrors,Two Tone Dark Toreador Red/Black Trim, Med. Parchment Int.
Hail to the Redskins!

[This message has been edited by V10 Rocks (edited 10-16-2000).]

[Knocker]

I agree with V10Rocks! The computer is programmed for 87. Thats it!

PS Do we all have flutter or not?

[robsd]

87 at Diamond Shamrock. Paying $1.31 per gallon(diesel $1.51). I've noticed no difference between the high and low grades.

Like everyone else...why pay more.

Rob

[crewzer]

I generally use 87, except for towing in hot weather, when I use 88 or 89.

Note that FMC says to not use anything less than 87, including in high altitude areas, where "regular" can be 86...

[spoon]

FYI:
Regular is 85 'up' here (CO), mid-grade 87, premium 91.

I have found 88 (UT) to be ideal.

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2001 F251 SRW Lariat CC 156" 4x4 OffRoad, Camper Pkg., V10, Auto, 3.73LS, Snuglid, 265x75R Geolandar AT
Born, KTP: 8-3-00, Delivered: 8-29-00,
Recalled: 9-2-00

[xpracr]

V10 Rocks is absolutely right. In addition to carbon build up, octane which is above what the motor is designed to run can actually result in less short term performance. The higher the octane the less BTU content of the fuel. Also, the slower burn acts in the same way as retarding ignition timing. I always laugh at these guys that drive there low compression hotrods down to the track on pump fuel and fuel up with VP or Cam2 when they get there thinking the octane is going to make them go fast.



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Assembler FoMoCo/KTP