Last post on Dec 16, 2011 at 7:45 AM
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Chevrolet Impala, Fuel System, Fuel System, Sedan
#2 of 34 Gasoline grade?
Mar 15, 2006 (12:44 pm)
Hello everyone, I'm seriously considering the Impala SS as my next car. What grade of fuel is required for the SS 5.3? I drive alot of miles per year, mostly highway. I prefer the Impala's interior and Bose audio option over the Grand Prix GXP interior. Any changes for the SS in the future? Thanks!
#3 of 34 Re: Gasoline grade? [sbb2]
Mar 15, 2006 (3:50 pm)
The manual recommends 91 or better but the engine runs fine on 87. I have run both and think I can feel the difference in acceleration but it may be in my head. Others have mentioned that approx $3 difference per tank full is worth the added performance and I tend to agree. Also, one has mentioned improved economy with premium fuel but I haven't noticed a difference...yet.
As for the Bose system, it sounds great at volume but there is an issue while listening at lower volumes. Basically, it's a hiss similar to old cassette tapes that you can hear at low volumes or (since the sound system handles door/warning chimes) whenever there are chimes. Road noise drowns it out for the most part, but it is definitely noticeable if you listen to the radio at moderate volume with the ignition off. Try it at the dealer and you'll most likely understand what I'm talking about. If you happen upon a dealer that has a Bose system WITHOUT the low volume hiss, please pass that along to all of us. We are all waiting for a possible fix.
One last thing, don't be fooled by the EPA mileage estimates on the sticker. So far, no one is getting anywhere close to 28 mpg highway.