I was just wondering (Fuel Question)

coolcity wrote:

Daveinet wrote:

coolcity wrote:

spritz_55423 wrote:
My 1999 Deville Concours, Says right under the fuel gauge to use only Premium. 185,000 miles
My 82 Pace Arrow 454 4 bbl runs better on premium more pep no pinging.48,000 miles
My 1964 deville convert uses Premium/non oxygenated 71,000 miles
I run Premium every tank.
Sorry but I think it makes all the difference.:B

My 2003 325HP Northstar STS said premium fuel but I always used 87 and it ran perfectly fine for the last 60K miles.all smoke and mirrors on newer port injected computer controlled engines

Both arguments are erroneous and have absolutely NOTHING to do with octane rating.

On contrare its all about octane. manual suggest,s(recomends) useing premium fuel(higher octane)I use regular fuel(lower octane)(cheaper to buy)+ still ran perfectly fine so I stick with it(lower octane fuel)The guys 84 454 pace arrow pinged on low octane fuel so he used premium and no pinging(higher octane fuel)
its all about Octane ratings
Now that being said none of this answers the OP question at all

The fact that your Northstar runs fine is because it has a computer - so it is an irrelevant argument. The computer will make it run fine, no matter what fuel you run, however higher octane will make more power in the Northstar Engine. Your Northstar is designed to run premium, but the computer detunes it to run on the lower octane. The DEtuning means that it has less power, so your definition of "fine" is not really an accurate method of judging octane.

There was also a listing of the mileage on each engine, as if to say the fact the engine is still working is criteria for it being OK or not. The '84 454 does not need premium if one is running per OEM conditions and tuning. If it is knocking, it is probably a result of carbon build up in the engine or someone has advanced the timing beyond the design point. While higher octane may make it run better, it is not the root cause solution.