Last post on Aug 02, 2010 at 3:09 AM
You are in the Chevrolet Corvette
What is this discussion about?
Chevrolet Corvette, Coupe, Convertible
#41 of 50 Re: Regular gas... [vettever]
Jul 11, 2009 (8:27 pm)
Ah, but the question is, why no pinging? The C5's and most newer cars have
ECU's that register the grade of the fuel burning and when they get the news
that the octane is down, they just detune the car to run with less zip. Not
bad for the engine or anything. You just aren't getting the same performance
you would get with 91 or higher grade. Then again, for fun you can add 100
octane unleaded at the track to top up the tank, about 1/4 tank to average up
to 93 octane or 1/2 tank to get just past 95 octane, it does make a difference.
Just make sure you never get to the leaded race gas, expensive to replace
#42 of 50 Re: Regular gas... [vettever]
Sep 14, 2009 (7:45 am)
Actually, C5's cannot determine grade of fuel, whether it be E10, non-ethanol, 87,89,91 or 93 octane. What does happen is if engine knock sensors detect any knock, the ecm will resort to using a lower timing table, in effect, pulling timing until knock is gone. The ecm contains two timing tables. Every day driving and no knock, engine will use more agressive of the two tables. If engine identifies knock, it will default to lower table and actually start to learn and blend both low and high timing tables until max timing can be used without knock. Over time and with no knock, engine will try to return to using higher/more agressive timing tables.
#43 of 50 Re: Regular gas... [vettever]
Feb 05, 2010 (8:05 am)
I just bought a 2003 Corvette (not a Z06) and have been putting mid grade gas in it which I believe is 89 octane I have not felt any knocking or anything that makes me feel I am losing power.
I realize that I may have had some premium gas in the tank when I filled it with the mid grade so I am going to experiment after I awaken my car from hibernation and begin using midgrade and then going down to 87 octane just to see what develops.
I believe that no damage can happen to the car unless you get your gas in a foreign country.
I tried 87 octane gas in a Pontiac Solstice with the turbocharged engine and it still worked well but if your car usually uses Premium gas because of the power you will lose a little power by dropping the grades but if you drive in city traffic a lot you will hardly notice the difference.
#44 of 50 93 Ruby she get's about the same
Sep 02, 2009 (4:05 am)
My baby averages 17-19 city and log hauls 29 give or take a a mile. Don't really watch it that often or notice changes with speed but that's pretty consistant for her when I do check. Glad to know I'm not crazy when I tell people what I'm getting they say can't be.
#45 of 50 surprisingly good. we are both impressed
Nov 30, 2009 (12:02 pm)
Wife and I driving our first Vette. Is a 2010 LT2 coupe with manual tranny. We just got the car a week ago. Getting 34mpg at 65mph and 25mpg at 80mpg. We are sure surprised and happy with that.
Nov 30, 2009 (11:49 am)
Wife and recently took control of our first Corvette. Is a 2010 LT2 Coupe, Blade Silver, 6 speed manual with Callaway shift linkage, upgrade chrome wheels, all body-color attachments (door handles, trunk spoiler light) and grill, exhaust and side cove inserts of the screen. Beautiful setup by Harchelroad Motors, Imperial,NE. Thanks folks. Well done. We get great fuel mileage of 34mpg at 65mph and 25mpg at 80mph. Is as much fun to look at, for us, as to drive. We love the car. Takes some jockeying to get the seat comfy on driver side, being one with long legs. At any rate, this is huge fun for both of us. I hope many of you can recall your first...Vette.
#47 of 50 Re: First Corvette [kentmagnuson]
Nov 30, 2009 (11:10 pm)
Ok, after your 4th post, I've got to tell you it's a 2LT, not a LT2.
#48 of 50 Re: First Corvette [kentmagnuson]
Feb 05, 2010 (1:07 pm)
I just bought a Corvette this past November, It is a 2003 convertible with a 6 speed manual and my first Corvette.
I am 68 years old and hope that I can continue to enjoy this car for many years to come, I told my 34 year old son to be nice to me and he may get this Corvette someday and I know he loves the car.
The gas mileage is very good and the power of this car is awesome at least my wife tells me this when I take her for drives.
I really wish that I didn't wait so long to buy a 'Vette but mortgages,children,etc got in the way so I can see why GM says the Corvette was aimed at the 55+ year old crowd.
#49 of 50 Re: First Corvette [kentmagnuson]
Aug 01, 2010 (6:37 pm)
I just bought a new 2010 Corvette base coupe w/automatic. Computer showed first tank of gas averaged 20 MPG (Chevron 91 octane premium with 10% ethanol) and mixed driving. However, the dealer set the tire pressure high (34 lbs cold). I have since lowered tire pressure to 30 lbs cold as recommended. Have you had a chance to try 100% gasoline vs 10% ethanol blend? Did it make any difference?
#50 of 50 Re: First Corvette [rsmith8]
Aug 02, 2010 (3:09 am)
Ethanol is one of my current bit*hes. I feel I've lost about 2mpg on all my cars because of ethanol. This includes my 2007 Corvette.