Ranger Posted February 20, 2009 Report Share Posted February 20, 2009 I'd be surprised if he stopped by (though it would be nice). He won't acknowledge who he is anymore. Link to comment Share on other sites More sharing options...
David Brown Posted February 27, 2009 Report Share Posted February 27, 2009 Well it took a little time but I found my notes that I made at the time. "Select PCM Data PD42, note octane level, Lower Base ignition timing using, PCM Override PS22" That's what I have on that. As said before I checked and the octane was already set to 87. Hope that helps. Link to comment Share on other sites More sharing options...
GaryB94558 Posted May 29, 2010 Report Share Posted May 29, 2010 I have a 99 Deville. I tried mid grade fuel several times and it pinged when I accelerated. So...I basically gave up on that and have just run Premium in the car for the majority of the 192,000 miles. Link to comment Share on other sites More sharing options...
Texas Jim Posted May 29, 2010 Report Share Posted May 29, 2010 I have a 99 Deville. I tried mid grade fuel several times and it pinged when I accelerated. So...I basically gave up on that and have just run Premium in the car for the majority of the 192,000 miles. I also experimented with my '06. Didn't work well. i too just run Premium all the time and don't worry about it any more. :D Link to comment Share on other sites More sharing options...
human Posted June 6, 2010 Report Share Posted June 6, 2010 I have owned two cars with Northstars: a '98 Olds Aurora (may she rest in peace, or pieces, as the case may be) and a '97 Deville Concours, which I am presently driving. My experience with different fuel grades has been similar in both cars. There is a noticeable loss of performance and fuel economy on regular, but the difference in performance and fuel economy on mid-grade is negligible, compared to that on premium. The Aurora did 18-19 around town on either mid-grade or premium and about 30 on the highway. With regular, I would get around 15 in town and 25 on the road, if I was lucky. The Concours is a little thirstier (heavier, less aerodynamic vehicle with a bigger engine) and gets about 15 or 16 in town and 26 on the highway on a good day when running mid-grade or premium, and about 13 in town and 23 on the road with regular. I have also noticed that the Concours doesn't like ethanol blends as well as it does straight petrol. A mid-grade 10% ethanol blend will perform like straight petrol regular. That's one reason I keep that car, like the Aurora before it, on a steady diet of BP Silver. Of course, the 5% rebate on my BP card also helps, but the oil spill is making me start to rethink that. The secret to flying is to throw yourself at the ground--and miss! --Douglas Adams Life, The Universe, and Everything Link to comment Share on other sites More sharing options...
Texas Jim Posted June 6, 2010 Report Share Posted June 6, 2010 I have 80,000 on my 2006 DTS. I have done multiple road trips in it since I bought it new. I have done multiple experiments with fuel. I have compared Regular and Premium. I have compared "REAL GAS" to the 10% Ethanol blends. This may not be applicable to anyone else's car but... On "MY CAR" I take about a 10% hit on mileage when running Ethanol blend vs "REAL GAS" It takes a small hit on power when running the Ethanol blend also. When running regular...it takes almost a 15% hit on mileage and a "HUGE" hit on power. When passing and you go WOT... it feels so sluggish that you think something is wrong with it. SO..in conclusion...at least on "MY CAR"... I gave up trying to run "ANYTHING BUT" premium. Heck..it is an almost new Cadillac... if I can't afford to put good gas in it... I should have bought a V6 Chevy. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.