Fuel economy for 87 vs 91 octane gas

  #1  
Old 12-25-2008, 02:21 PM
Thread Starter
Join Date: Dec 2008
Posts: 2
Default Fuel economy for 87 vs 91 octane gas

Folks,

I was under impression that 91 octane rating for my Lexus RX330 (2005 model) should give me higher MPG compared to 87 octane gas. But I am somehow getting opposite results.

With 87 type gas, my car shows MPG anywhere between 18 and 23. While with 91 type gas, it shows anywhere between 14.5 and 18 MPG.

I want to know if it is usual to see lower MPG with higher octane fuel? If not, then what can be the reason for such change in MPG?

Merry Christmas and Happy New Year -2009.

Cheers,
Vikas
 
  #2  
Old 03-07-2009, 12:54 AM
Junior Member
Join Date: Aug 2008
Posts: 27
Default

Depends on what the engine was made for. If it's a high compression engine than you want high octane. I believe the some are made for high octane gas but can run on regular and advertise it as such.
_______________________________
use drying towel in cleaning your car
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Dockman53
General Tech Help
4
07-16-2008 01:31 AM
calroon
PRIVATE For Sale / Trade Classifieds
0
02-16-2007 11:23 AM
Lexus RX
0
01-08-2007 03:24 PM
Camba20
Off Topic
1
04-13-2005 06:47 PM


Thread Tools
Search this Thread
Quick Reply: Fuel economy for 87 vs 91 octane gas


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.