Is Premium Gas ok? - Page 6 - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus First Generation > DURATEC Performance (2003-2007)

DURATEC Performance (2003-2007) The place to chat about any Duratec 23, 23E, and 20 engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    


LinkBack Thread Tools Display Modes
Old 02-10-2014, 09:18 AM   #51
Focus Rookie
Join Date: Feb 2014
Fan#: 140617
Location: Ft. Wayne, IN
What I Drive: 2012 Focus SEL

Posts: 12
Points 10, Level 1
Points: 10, Level: 1 Points: 10, Level: 1 Points: 10, Level: 1
Level Up 19% Completed
Level up: 19% Level up: 19% Level up: 19%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 mlheck Good Standing Member
Buy-Sell-Trade Rating: (0)
The ECM retards or delays the timing if it senses knock through the knock sensors in the block. The timing will run at the setting pre-programed into the ECM. This setting is predetermined by the engineers and will not move beyond this maximum no matter what fuel you use.

Retarding timing makes less power.

Increasing timing makes power.

Back in the day before computers we had full control over the timing. But many a motor was trashed by somebody trying to advance the timing to far. Pre-ignition will melt a hole in the top of a piston or bend a connecting rod.

If your car calls for premium you actually affect the efficiency of the motor and your gas mileage by using a lower octane.

Ethanol is a joke and actually has a lower thermal burn therefore producing less power per gallon compared to straight gasoline. It also draws water and is corrosive to steel fuel lines. It also causes plastic fuel tanks to swell. Ducati had a major issue with their plastic fuel tanks and Ethanol.

To answer your original question, putting premium in a engine not designed to use it won't damage it, but is a waste of money. Many here have said different, but it comes down understanding what the ECM can and can't do and the science behind it.

The one thing everybody has to understand is that your motor is one large physics project. Every change you make affects the properties acted on by the other laws of physics and science inherit in a internal combustion motor. If you ever get the chance to talk to a engineer that designs internal combustion motors you would be surprised by how many misconception there are on these forums.

Last edited by mlheck; 02-10-2014 at 04:33 PM.
mlheck is offline  
    Reply With Quote Quick reply to this message
Sponsored Links

Bookmarks & Social Networks

Quick Reply

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What I Drive
Year, color, and model of your car. Example: 2003 Pitch Black ZX3
Your real name.
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 04:37 AM.

Copyright 2002-2015 All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.


Search Engine Optimization by vBSEO 3.6.1