Gas, Oil And Gas Mileage **** SERIES II ENGINES**** - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

View Poll Results: What's your gas mileage in the city?
17mpg 4 12.90%
16mpg 5 16.13%
18mpg 5 16.13%
19mpg 6 19.35%
20mpg 3 9.68%
21mpg 4 12.90%
22mpg 2 6.45%
23mpg 1 3.23%
24mpg 0 0%
25mpg 1 3.23%
Voters: 31. You may not vote on this poll

Reply
 
 
 
Thread Tools Search this Thread
Old 02-02-2007, 11:44 AM   #1
Senior Member
Posts like a Turbo
Thread Starter
 
Join Date: Jan 2007
Location: Buffalo, NY
Posts: 216
Thanks: 0
Thanked 0 Times in 0 Posts
Nashville Cowboy is on a distinguished road
Default Gas, Oil And Gas Mileage **** SERIES II ENGINES****

Just curious, is it fine to put 93 octane in an N/A Bonne, any good or bad effects? What about using synthetic oil, is it a waste of money? I usually only use synthetic but the mechanic where I got the Bonne said it'd be a waste of money in the Bonne because it hasn't been used from day 1... Also curious as to what your gas mileage is in city driving? I've been trying to figure out how to guage my gas mileage by the reading on the gas guage and the trip odometor but if that'* correct than I'm only getting about 16mpg which is rediculous! I think I'm not doining something right.... My calculations showed that each little tick mark on the gas guage is .75 gallons, not sure if that is correct but theirs 24 total tick marks and the gas tank is 18 gallons. So in order to get 20mpg according to this theory, if the tank is full than by the time your at 3/4 of a tank you should have driven 90 miles.....not happening with me It'* more like 70.
Nashville Cowboy is offline   Reply With Quote
Old 02-02-2007, 11:49 AM   #2
Senior Member
Certified Car Nut
 
Join Date: Oct 2003
Posts: 19,756
Thanks: 0
Thanked 0 Times in 0 Posts
1993 SLE is on a distinguished road
Default

you only need to Run 87 octane in your NA car.....87 is what its designed to run on
1993 SLE is offline   Reply With Quote
Old 02-02-2007, 12:01 PM   #3
Senior Member
Posts like a Corvette
 
Join Date: Jan 2007
Location: San Diego, CA
Posts: 1,451
Thanks: 0
Thanked 0 Times in 0 Posts
agrazela is on a distinguished road
Default

I don't know that I can vote in your poll, because I don't do straight city driving in my '98...I'm a mix of about 25%/75% city/freeway. With that, I get about 23-24 mpg.
In that same car when we hit the highway on vacation, we get 30-32 mpg.

My wife'* '04 is seeing about 50%/50% city/highway right now, and its DIC is telling us 18.3 mpg. Haven't had that baby on a long trip yet.

All this is on 87 octane. On a stock n/a, nothing more is needed (unless you are experiencing bad knock).

As for synthetic oil. It costs more, yes; but when I factor in 7500 mile oil changes (versus 3750 mile with dino), plus 5% to 10% better fuel economy (in my experience), plus greatly reduced valvetrain noise, etc., I think it is worth it.

P.*.: 16mpg in 100% city driving in that car is probably not too bad.
P.P.*.: I don't know about yours, but my gas gauge is not really linear...i.e., when it reads 1/2, it has actually consumed more than 1/2 the tank. The best way to measure mpg'* is to fill the tank, drive a few days, record miles driven, re-fill (at same pump!), record gallons, then calculate.
P.P.P.*.: I supposedly have an 18 gallon tank, too...but I can squeeze at least 22 gallons into it when it'* way down on "E"; that filler tube must be huge.
agrazela is offline   Reply With Quote
Old 02-02-2007, 12:44 PM   #4
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Even if we all drove purely in the City, traffic, streets, length of commute, and several other factors make the poll options worthless.

The only way to really compare is by freeway driving at a pre-determined speed on a long trip.

Premium fuel is simply harder to ignite than low or mid-grade. There'* no 'power' in it. It'* a waste of money for a non-supercharged engine UNLESS you have an aftermarket PCM advancing your timing.

Every car here should be capable of 30mpg on the freeway. Even my beast gets 32mpg at 70mph.

In addition, the amount of fuel in your 'first' or 'top' quarter tank is more than the 'bottom' or 'last' quarter tank. Your fuel tank isn't a geometrically perfect shape. The top half of the tank has more usable volume than the bottom.
willwren is offline   Reply With Quote
Old 02-02-2007, 01:46 PM   #5
Senior Member
Posts like a Camaro
 
Join Date: Aug 2006
Location: West Michigan
Posts: 1,152
Thanks: 0
Thanked 1 Time in 1 Post
Grimm is on a distinguished road
Default

Ditto that. You can't go by the guage. I never go by the guage for how much gas I have left. After figuring many many times what I normally get for mileage, I go by the miles I've driven.

I estimate I get around 20-22 in the city, but hard to really tell since I drive 75% highway.
Grimm is offline   Reply With Quote
Old 02-02-2007, 01:52 PM   #6
Senior Member
Posts like a Turbo
 
Join Date: Dec 2004
Location: East Texas
Posts: 242
Thanks: 0
Thanked 3 Times in 2 Posts
Ivory03 is on a distinguished road
Default

I live in a smaller town of 30,000. Most trips are very short so we average around 15-16 in town at best. I've seen several at 14.5 on the cluster.

I hate comparing city mileage. There are too many factors.. Small town and short trips, hills, agressive driving and etc. But those are my numbers on my 03 SSEi.

Patrick
Ivory03 is offline   Reply With Quote
Old 02-02-2007, 02:16 PM   #7
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'm of the mind that you can't base your city MPG off anything but what it is with a good maintained engine.

You can't control stoplights, pedestrians (stop running them over..it'* illegal), and many other factors that are huge to MPG.

However..if I were in the city..my MPG would be infinity.. I wouldn't drive.
BillBoost37 is offline   Reply With Quote
Old 02-02-2007, 02:19 PM   #8
Member
Posts like a V-Tak
 
Join Date: Dec 2006
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
95LHS is on a distinguished road
Default Re: Gas, Oil And Gas Mileage **** SERIES II ENGINES****

Quote:
Originally Posted by Nashville Cowboy
I usually only use synthetic but the mechanic where I got the Bonne said it'd be a waste of money in the Bonne because it hasn't been used from day 1...
Reliability of info isn't his strong point.

Use synthetic if you wish. You'll get longer change intervals, better MPG, and better protection for your engine.
95LHS is offline   Reply With Quote
Old 02-02-2007, 03:21 PM   #9
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Quote:
Originally Posted by willwren
Every car here should be capable of 30mpg on the freeway. Even my beast gets 32mpg at 70mph.

lol...hehhehheh...whohohaohoa...muhaahahah BHWHAHAHAHHa, ROFLMAO!

Sorry....
Rogue is offline   Reply With Quote
Old 02-02-2007, 03:40 PM   #10
Senior Member
True Car Nut
 
Join Date: Oct 2003
Location: Pittsburgh, Pa.
Posts: 7,551
Thanks: 0
Thanked 0 Times in 0 Posts
SSsuperchargedEi is on a distinguished road
Default

generally 17-19 city
SSsuperchargedEi is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Dexos Oil For new Gas & Diesel engines? Soft Ride General GM Chat 18 01-10-2014 03:39 PM
Egr valve pipe for 1995-2005 3800 Series II engines Crece General GM Chat 2 11-27-2012 06:08 PM
Aftermarket parts for series 1 engines? drew2541 Performance, Brainstorming & Tuning 9 12-06-2007 03:51 AM
3800 Engines Series 111 & 11 garblin 2000-2005 4 05-22-2006 08:27 AM
Series 1 and series 2 engines completely different..? TUGvr4 Forced Induction 16 10-29-2003 11:24 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:16 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.