anyone using premium gas ? - Page 67 - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace



Go Back   Focus Fanatics > Ford Focus Third Generation > DURATEC Ti-VCT Performance (2012-Current)

DURATEC Ti-VCT Performance (2012-Current) The place to chat about any Duratec 2.0L Ti-VCT engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
FocusFest Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 01-25-2013, 01:14 AM   #661
thejordan
Focus Addict
 
thejordan's Avatar
 
Join Date: Dec 2012
Fan#: 107706
Location: Southern, CA
What I Drive: 2013 SGM Focus 5 Speed

Posts: 598
FF Reputation: 3 thejordan Good Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by mishka View Post
for me the price difference is about $4 a tank at the current price ($3.70 for premium)
And what's your mpg difference?
thejordan is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 01-25-2013, 07:20 AM   #662
mishka
Focus Addict
 
mishka's Avatar
 
Join Date: Dec 2012
Fan#: 107408
Location: Fairfax, VA
What I Drive: 13' TB SE Sport Sedan DCT 201A pack

Posts: 965
FF Reputation: 1 mishka Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by thejordan View Post
And what's your mpg difference?
I have no idea. and i'm not sure how to accurately measure it because my driving habits vary.
__________________
~ Shadowfax ~
mishka is offline  
    Reply With Quote
Old 01-25-2013, 07:36 AM   #663
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,116
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
I have felt zero difference between 87 octane and 93 octane, although at this particular time during winter my mileage is much worse than it was when it was warmer, at least in terms of driving around town. It doesn't feel more powerful or faster, but then again I'm not constantly running it against the redline all the time or into the higher rev ranges.

Although if you were to wind it out and then slam on the brakes it tends to hang revs for a second or two after you stop, which is not good.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is offline  
    Reply With Quote
Old 01-25-2013, 07:43 AM   #664
mishka
Focus Addict
 
mishka's Avatar
 
Join Date: Dec 2012
Fan#: 107408
Location: Fairfax, VA
What I Drive: 13' TB SE Sport Sedan DCT 201A pack

Posts: 965
FF Reputation: 1 mishka Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by suss6052 View Post
I have felt zero difference between 87 octane and 93 octane, although at this particular time during winter my mileage is much worse than it was when it was warmer, at least in terms of driving around town. It doesn't feel more powerful or faster, but then again I'm not constantly running it against the redline all the time or into the higher rev ranges.

Although if you were to wind it out and then slam on the brakes it tends to hang revs for a second or two after you stop, which is not good.
Yeah it does seem worse when it's colder , you're right. It's 20 degrees F here right now.. probly much colder in Michigan >;P
I haven't slammed on the brakes yet, and hope I never have to. I also have not seem it "hang revs" after stopping - yet - and hope I never do :)
__________________
~ Shadowfax ~
mishka is offline  
    Reply With Quote
Old 01-25-2013, 09:11 AM   #665
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,116
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally Posted by mishka View Post
Yeah it does seem worse when it's colder , you're right. It's 20 degrees F here right now.. probly much colder in Michigan >;P
I haven't slammed on the brakes yet, and hope I never have to. I also have not seem it "hang revs" after stopping - yet - and hope I never do :)
Most of the time if you stop even if you stop fairly abruptly it won't do that, only if you were really going and then suddenly stop, something I try not to do normally and the engine was wound up in lower gears it seemed to hold onto the engine speed longer than absolutely necessary.

I think I had finally managed to run into a use case that more people may see more often, which is a sign that they are typically abusing the vehicle most of the time as that had not happened before or since.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is offline  
    Reply With Quote
Old 01-25-2013, 09:35 AM   #666
mishka
Focus Addict
 
mishka's Avatar
 
Join Date: Dec 2012
Fan#: 107408
Location: Fairfax, VA
What I Drive: 13' TB SE Sport Sedan DCT 201A pack

Posts: 965
FF Reputation: 1 mishka Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by suss6052 View Post
Most of the time if you stop even if you stop fairly abruptly it won't do that, only if you were really going and then suddenly stop, something I try not to do normally and the engine was wound up in lower gears it seemed to hold onto the engine speed longer than absolutely necessary.

I think I had finally managed to run into a use case that more people may see more often, which is a sign that they are typically abusing the vehicle most of the time as that had not happened before or since.
ok so you're saying that if one notices higher reving then normal after stopping, and they had not stopped abruptly, then they are abusing their car?
__________________
~ Shadowfax ~
mishka is offline  
    Reply With Quote
Old 01-25-2013, 11:12 AM   #667
Ranx0r0x
Focus Rookie
 
Join Date: Jan 2013
Fan#: 109077
Location: Austin, TX
What I Drive: 2013, White, SE Hatch

Posts: 4
FF Reputation: 1 Ranx0r0x Good Standing Member
Buy-Sell-Trade Rating: (0)
Stumbling...

dan50,

If you're getting stumbling with either 87 or 91 I'd say there's something wrong worth checking. I'm a new SE owner so don't know all the details of the engine operation of our vehicles.

In most new cars if the crank senses a difference in the amount of power from cylinder to cylinder the ECU changes operation. A common source of this problem is misfire. Plugs are a suspect and they are the cheapest to check and fix. A typical sign of plugs misfiring is stumbling at low RPM which smooths out at higher RPM.

Have you changed the plugs or wires recently? If so, did you switch from a colder to hotter or hotter to colder plug? Have you pulled the plugs to give them an eye?

Again, I'm a new owner of this vehicle/engine so I'm not up on its actual operation but this would be my first suspect.
Ranx0r0x is offline  
    Reply With Quote
Old 01-25-2013, 11:58 AM   #668
JasDmw
Focus Enthusiast
 
Join Date: Oct 2012
Fan#: 105501
Location: Calgary, Canada
What I Drive: 2013 Focus Ti Hatch Sterling Grey

Posts: 92
FF Reputation: 1 JasDmw Good Standing Member
Buy-Sell-Trade Rating: (0)
Not sure if I'm allowed to post a link, but a Canadian consumer news program did a story on premim VS regular. To no ones real surprise, if you car doesn't need it (per the manufacturer), you are wasting your money. In fact, one very artsy lady driving a Honda Civic, who thought the environmental benefits outweighed the price was stunned to find the pollution form the exhaust is worse with premium! They had an expert put a brand new GM car on a dyno and measured all that could be measured. Essentially, the computers in our cars adjust to the fuel. In most cases there was no benefit and in some there were worse scenarios.

If posting the link is verboten; my apologies.

http://www.cbc.ca/marketplace/episod...mpfiction.html
JasDmw is offline  
    Reply With Quote
Old 01-25-2013, 12:11 PM   #669
cobie56
Focus Fanatic
 
Join Date: Mar 2011
Fan#: 84403
Location: northeastern, NY
What I Drive: '01 ZX3, '14 Civic XL '12 SEL

Posts: 1,575
FF Reputation: 2 cobie56 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by JasDmw View Post
Not sure if I'm allowed to post a link, but a Canadian consumer news program did a story on premim VS regular. To no ones real surprise, if you car doesn't need it (per the manufacturer), you are wasting your money. In fact, one very artsy lady driving a Honda Civic, who thought the environmental benefits outweighed the price was stunned to find the pollution form the exhaust is worse with premium! They had an expert put a brand new GM car on a dyno and measured all that could be measured. Essentially, the computers in our cars adjust to the fuel. In most cases there was no benefit and in some there were worse scenarios.

If posting the link is verboten; my apologies.

http://www.cbc.ca/marketplace/episod...mpfiction.html
the link does not work... even when i go to marketplace's home page.... the vid shows up but won't play... tried it on both a pc and a mac... oh, well.
cobie56 is offline  
    Reply With Quote
Old 01-25-2013, 12:17 PM   #670
Ranx0r0x
Focus Rookie
 
Join Date: Jan 2013
Fan#: 109077
Location: Austin, TX
What I Drive: 2013, White, SE Hatch

Posts: 4
FF Reputation: 1 Ranx0r0x Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by JasDmw View Post
...To no ones real surprise, if you car doesn't need it (per the manufacturer), you are wasting your money....
Fortunately for us the Focus owner's manual specifically states that higher octane fuel improves performance. Easiest way to do that isn't all that high tech. Just advance the timing until knock is sensed then retard it a bit. Higher octane resists detonation as it can handle higher pressure and heat.

In other words, with premium gas the combustion process can start earlier.

Knock is relatively easy to detect due to its almost universal sound spike at around 6400 Hertz.
Ranx0r0x is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 10:40 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

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 Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.