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87 Octane ?

05_2500HD

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mmmikkke Senior Enthusiast

mmmikkke

Posted
Posted

I second the What?*@!?

 

My 05 2500HD has never seen 89 octane. At about 11K miles now, still seems ok.

 

87 octane seems to get the job done just fine.

05_2500HD Enthusiast

05_2500HD

Posted
  • Author
Posted

OK my bad, the manual says for 6.0L engines use "91 or higher for best performance" It also says "you may use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicle's acceleration may be slightly reduced"

 

The heck with all of that. With prices what they are I'm going to start using 87 and deal with it.

mmmikkke Senior Enthusiast

mmmikkke

Posted
Posted
OK my bad, the manual says for 6.0L engines use "91 or higher for best performance" It also says "you may use middle grade or regular unleaded gasoline rated at 87 octane or higher, but your vehicle's acceleration may be slightly reduced"

 

The heck with all of that. With prices what they are I'm going to start using 87 and deal with it.

 

 

 

Phew!

 

Now I wanna try 91 octane to see how much faster it can be...

ctfan Enthusiast

ctfan

Posted
Posted

In my 01 I use to run 89 octance cause it was a little cheaper. The thing pinged some if I had to go up a hill or something like that where the motor had to work. I switched to 87 and the pinging reduced alot and I got about a .5 to 1 full mpg better. Maybe it is cause out 89 is mixed with 10% ethonal.

 

William

curly Enthusiast

curly

Posted
Posted

I have run 87 in my truck since I bought it new and no problems. I will run a tank of 89 or 93 through it occasionally since the higher octanes do normally have more cleaning agents in it (a family mechanic recommended this). It will be a while before it gets anything other than 87 since the price has gone up :confused: .

Fxd01 Enthusiast

Fxd01

Posted
Posted

I run 87 unless hauling a heavy load. The truck seems to have more power and doesn't ping with 89. I was running 89 all the time until gas prices went up.

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