Fill 'er up...WOW!

[Zsolt]

I personally never could tell the difference between regular or premium. 
The car seems to run the same, getting the same gas mileage etc.
This was the case with my 86 and 88 5ktq, and also an 84 5kS I used to have.

Cheers,
   Zsolt

George Butler wrote:

> Hello all,
> 
>  
> 
> I need to pick the collective brain of the list on what may be a 
> question with a fairly obvious answer...
> 
>  
> 
> The scenario:
> 
>  
> 
> After putting a boneyard engine (88 5ksq, w/75k supposedly certified 
> miles) into my son's 88 5ksq he's noticed that the car was lacking the 
> power of his old engine.  I told him that, until I could get the 
> weather/time to go through it, to start using fuel injector cleaner 
> every other fill up...which I'm sure he did for the first month.  The 
> performance did increase very slightly (placebo effect I think) 
> afterward.  Early last week he told me that he had put a tank full of 93 
> octane in it and that it [engine] suddenly had "unbelievable" power.  
> He's continued to use high test and is getting great results!
> 
>  
> 
> The question:
> 
>  
> 
> What would be askew with the engine to prevent it from getting adequate 
> performance with a slightly lower octane rating?  TIA
> 
>  
> 
> Regards,
> 
>  
> 
> George B.
> 
> Massachusetts
>