I started using fuel injector/carb cleaner back in the 90's. A local Honda
dealer in MD recommended it to a friend after they replaced all the fuel
injectors in his Prelude.
Anyway, anyone else noticing the demise of 93 octane gas? Last summer the
local Shell station switched from 93 to 91 octane high test. Today on my way
home, I stopped at the Mobil station which sold 93 octane gas, and they had
a 91 octane sticker pasted over the 93 octane pump. I think Gulf is the
only one left in my area still selling 93 octane.
- Tom
On Tue, Apr 15, 2008 at 8:39 AM, Bob Spidell <bspidell@comcast.net> wrote:
> Hoo boy, this should start a thread (politics, anyone?).
>
> MTUO (My Totally Unscientific Opinion): Short answer: no.
>
> There's something about "magical" additives that appeal to all of us
> (ask any marketer, or just check the shelves at your favorite parts
> house). Additives (gas or oil) may have been useful at one time, but
> now, gas and oil are both so standardized and generally good that there
> is no need (the recent thread on ZDDP is the exception that proves the
> rule, IMO). FI cleaner was actually useful at one time, as earlier gas
> formulations which worked fine for carburettors didn't have
> enough/proper cleaners for FI when it first became common, but that
> problem has been addressed.
>
> Anecdotally, I've disassembled SU carbs and fuel pumps several times
> over the last 25 years and have seen no evidence of any sort of gum or
> varnish buildup. I also keep a 2g can of gas for my lawnmower that
> (maybe) gets filled once a year and the unlined, mild steel inside is
> perfectly clean. Also, my new Mustang's owner's manual states
> unequivocally "do not put any crap in the gas or oil or your warranty's
> history" (well, something like that).
>
> BTW, I hope you run the FI cleaner BEFORE changing the oil; I believe
> those are corrosive and some of it--or its byproducts--may end up in the
> sump.
>
>
> bs
>
>
> T W wrote:
> > I usually dump a bottle of fuel injector cleaner in the gas tank of my
> other
> > cars when I change the oil. With our old lbc's, is it a good idea to
> run
> > some carb cleaner or fuel system cleaner thru? I figure a good
> cleaning
> > can't hurt, but I don't want to dissolve 40 years worth of gum and
> varnish
> > and really gum up the works.
> >
> > Any ideas?
> >
> > - Tom
> >
> ***************************************************************
> Bob Spidell San Jose, CA bspidell@comcast.net
> '67 Austin-Healey 3000 '56 Austin-Healey 100M
> ***************************************************************
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