I run 85 octane in my '98 Ram 1500 QC 4x4 AT 5.9L- lately I have noticed
pinging at part throttle when warmed up... started right about the time
Colorado switched to Green fuel (oxygenated w/ 10% ethanol)...My milage was
down to 13.5 or so from the 15 I normally get...
Then I noticed that the gas was cheaper out in Penrose (near my house) and
discovered that in Fremont County, they don't run the Oxygenated crap... now
I'm back to 15mpg, and the pinging went away.. just another advantage to
living in the country, I guess...
Gary Shook
p.s. 85 octane is NOT a typo... that's base fuel here in Colorado (above
5000') altitude reduces octane requirements... and power :-(
>>> On the way up, I filled up just before getting on the interstate with
>>> premium fuel (93 octane).
>>
>>I don't mean to start a war here, but I think you're crazy for using
>>anything higher than 87 octane. Just my opinion.
>
>
>I used to not use higher than 87, BUT I have noticed that my truck will
>start spark-knocking under WOT when it is hot , like after sitting in
>bumper-to-bumper traffic with the 87. From everything that I have heard ,
>the dealer will most likely tell me that I need to run premium (which I do
>not) as a fix , so untill I actually get the time to bring her by the shop
>and raise hell , I will run premium. Hell , I can get 93 octane here for
>about 95 cents per gallon , so I'm not complaining too much.
>
>But yes , the owner's manual says 87 , you are correct .
>Jack Hilton
>
>HEMI@charter.net
>
>
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