[DML] RE: Delorean Fuel

["secret_jedi_guy" <secret_jedi_guy@xxxxxxxxx>]

WOW! I really lit a fire with this topic didn't I.  Actually I 
appreciate the feedback about different fuels.  Here is a little bit 
of history with my car.  When I first bought it about six months 
ago, the owner told me that he only used 91 octane and he had it for 
12 years.  It seemed to be running fine at that point, no pings or 
knocks it ran very smooth, only gas mileage was pretty bad I 
averaged about 13 mpg at first.  I thought that was a little odd.  
When it came time for filling up I decided to try 87 first and that 
is when all heck broke loose.  I all of a sudden had starting 
problems, it stalled, gas mileage went from the 13 to 8 mpg, and it 
ran very rough.  Obviously something was very wrong.  I went back to 
the 91, but I guess that the damage had already been done.  It 
wasn't burning all of the fuel in the chambers and I had horrible 
emissions.  It's a good thing I didn't need to get it smogged any 
time soon.  I even had unburned gasoline coming out the exhaust 
pipes.  Really bad.  You might say that was just condensation and I 
thought that at first to but I actually caught some  in a cup while 
I was running the engine to figure out what was wrong and it was gas!

I immediately took it to a mechanic and found out what the problem 
was.  The other owner had never used any sort of fuel system 
treatments or cleaners at all.  Because he ran 91 octane the engine 
got used to running with that fuel and the deposits that had built 
up over time.  He had just over 60k miles on it when I bought it.  
So when I put in the 87 the engine basically didn't know what to do 
and it basically pushed through a bunch of carbon and other gunk 
that was fowling up the fuel injection and spark.  I let them do a 
full decarb on the engine and then I took it home and did a full 
fuel system cleanout.  Remember my post about that fuel filter?  
Cleaned out the injectors, manifold, air induction, and now she 
purrs, and my MPG went up from 8 to 24.  Nice increase.  However, I 
have taken to using 91 Cheveron with Techron.  I probably could try 
87 again, but I'm a little wary.

Japheth VIN: 1223








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