any info would be helpfull
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Joined: Mar 2011
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any info would be helpfull
Hi, My name is Larry, and i just bought a 1993 f250 5.8 and was wondering if i could get some info about what octane of gas would be best, are there any sites that i can get tech. info at? like when to do a tune up spark plug type.
thank you for your help in advance.
Larry
thank you for your help in advance.
Larry
Resident smarta$$
Joined: Aug 2006
Posts: 4,929
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From: Oaks,PA
Welcome Larry! If you scroll down to this section on the Forums page 1987 - 1996 F150 & Larger F-Series Trucks - Ford Truck Enthusiasts Forums they should be able to help you. This section is for the 09-up F150. Good luck! 
Post Fiend
Joined: Feb 2009
Posts: 8,005
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From: Ottawa, Ontario
Regular 87 octane is what these pigs run on.
Running any higher octane is useless. Higher octane is for higher compression engines. Just means the gas ignites at a higher temperature.
Now for those that will come and say, well my truck runs sooooooooooo much better on high octane, I'll explain why.
That means your engine is getting old, and has some carbon built up in the cylinders, witch closes the firing chamber, making it smaller.
So that means your actually raising your compression, because the firing chamber is smaller, creating higher temperatures, so higher octane gas will burn better in an older carboned up engine.
Running any higher octane is useless. Higher octane is for higher compression engines. Just means the gas ignites at a higher temperature.
Now for those that will come and say, well my truck runs sooooooooooo much better on high octane, I'll explain why.
That means your engine is getting old, and has some carbon built up in the cylinders, witch closes the firing chamber, making it smaller.
So that means your actually raising your compression, because the firing chamber is smaller, creating higher temperatures, so higher octane gas will burn better in an older carboned up engine.
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