Summer VS winter octane - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 12-14-2006, 01:25 AM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2002
Posts: 0
Thanks: 0
Thanked 0 Times in 0 Posts
Custom88 is on a distinguished road
Default Summer VS winter octane

I have a some-what odd question here. In my owner'* manual, it is called for that 87 octane can be ran fine in my engine, but 91 or higher is recommended for best performance. During the summer, I don't notice really any performance difference between running 87 octane, or 93 octane. BUT, in the winter time, I notice a huge difference between running regular and premium. Shouldn't I be noticing a larger difference in the summer, or am I wrong? Does this make any sense?
Custom88 is offline   Reply With Quote
Old 12-14-2006, 01:49 AM   #2
Senior Member
True Car Nut
 
95naSTA's Avatar
 
Join Date: Feb 2003
Location: Philly
Posts: 4,508
Thanks: 0
Thanked 0 Times in 0 Posts
95naSTA is on a distinguished road
Default

Its probably because they put all that crap in the gas for winter.
95naSTA is offline   Reply With Quote
Old 12-14-2006, 07:55 AM   #3
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

Could also have to do with the colder denser air. There'* a lot of factors that change from summer to winter. It'* tough to nail down a single one that is the cause.
BillBoost37 is offline   Reply With Quote
Old 12-14-2006, 08:28 AM   #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

I'd think it has far more to do with air temperature, but that'* easy to test if you switch back and forth on similar days.
willwren is offline   Reply With Quote
Old 12-14-2006, 07:21 PM   #5
Senior Member
True Car Nut
 
Join Date: Jan 2004
Location: Lakeville, MN
Posts: 4,328
Thanks: 0
Thanked 1 Time in 1 Post
fantastic88 is on a distinguished road
Default

I don't know what they put in gas for winter but I loose 5 mpg. Actually Custum I would think the 91 would be better in summer with the heat.
fantastic88 is offline   Reply With Quote
Old 12-15-2006, 02:43 AM   #6
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Quote:
Originally Posted by fantastic88
I don't know what they put in gas for winter but I loose 5 mpg. Actually Custum I would think the 91 would be better in summer with the heat.
You're also warming up the car more ( I assume).

Colder air is denser, and requires more fuel then the same throttle position then say a 90* day.
BonneMeMN is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Summer or Winter? Which one is your favorite? PRD2BDF Lounge 39 09-14-2007 08:03 PM
Octane Points (Octane Boost) bandit General GM Chat 2 08-28-2007 11:21 PM
SSEi Octane in gas?? BonneAlien General GM Chat 10 04-13-2003 04:42 PM
Octane boost pontiacfan1978 General GM Chat 4 10-24-2002 11:44 PM
Octane vze3r85p General GM Chat 29 10-22-2002 06:19 AM


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 11:57 AM.


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.