I'll toss in my vote for Mobil as well. I run 87 (as I don't have any
big engine mods and the stop computer) and noticed less pinging AND
better gas mileage once I switched exclusively to Mobil. Mobil is a few
cents per gallon more expensive here, but since I get better mileage, it
costs me less per mile to run it.
Ronald Wong wrote:
>
> Same here, Mobil for me. Actually, when I had stock PCM even with Mobil, at
> times, pinged with 87. I found it was easier just to use 89 all the time.
> That eliminated the problem. With the HP PCM I've only encountered pinging
> with one tankful (also Mobil). This was 92 octane. The temperature outside
> had cooled down about 15 degrees so if anything it should not have been
> pinging. I think sometimes it's just crappy gas. For the Labor Day weekend
> my Mobil station just raised its prices for 92 octane to $1.94/gallon.
> Isn't supply/demand wonderful?!?
> ;-P
>
> Ron
> 00 SLT QC 4X2 5.9 46RE 3.92 LSD
> For modifications see my DML Profile
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> [mailto:owner-dakota-truck@buffnet.net]On Behalf Of Jon Steiger
> Sent: Saturday, September 02, 2000 10:01 PM
> To: dakota-truck@buffnet.net
> Subject: Re: DML: RE: Pinging Question...
>
> At 09:22 PM 9/2/00 -0700, you wrote:
> >Pinging seems to be a common occurrence in all the Dak engines.
> Elimination
> >of this problem has been accomplished by one or more of the following
> common
> >solutions. There may be other solutions as well.
> >
> >1) Changing the spark plugs to a colder plug (Autolite 3923's).
> >
> >2) Having your PCM re-flashed by the dealer. This effectively retards your
> >timing. You may feel a loss of power after this is done.
> >
> >3) Changing to 89 octane gasoline.
> >
> >4) Changing to a different brand of gasoline.
>
> I never got any pinging with the stock computer, but I did get it with
> the MP PCM, even with 92-93 octane. A 180 degree thermostat fixed the
> problem for me. I also make sure to never fill up at a Coastal station as
> the local one would cause pinging every time. I almost exclusively go to
> Mobil stations. (Yeah, it probably all comes off the same truck, but I've
> had good luck with Mobil so far.) :-)
>
> -Jon-
>
> .--- Jon Steiger ---- jon@dakota-truck.net or
> stei0302@cs.fredonia.edu ---.
> | Affiliations: AOPA, DoD, EAA, NMA, NRA, SPA, USUA; Rec & UL Pilot - SEL
> |
> | '92 Ram 150 4x4 V8, '96 Dakota V8, '96 Intruder 1400, '96 FireFly 447
> |
> `------------------------------
> http://www.cs.fredonia.edu/~stei0302/ ----'
-- -andyhttp://home.twcny.rr.com/andylevy/ --- andylevy@bigfoot.com ------------------------------------------------------------- "I spilled spot remover on my dog. He's gone now..." --- Steve Wright -------------------------------------------------------------
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