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Topic Review (Newest First)
11-16-2014 09:56 PM
Originally Posted by H2323 View Post
Cheap Canadian gas station
It's actually FasGas. But still cheap off brand gas.
11-14-2014 08:01 PM
Originally Posted by jrfender View Post
First time in a long time, 87 gas was under $3 today. Is premium really worth the extra since the engine is design for 87 fuel efficiency?
This will be debated until the Focus Mk10 arrives. I'd say at steady state 60-65 mph with speed control engaged, on no grade, it probably isn't. Get on the throttle occasionally, it may be.

Until we see dynamometer readings of 87 vs. 91 we won't really know.

Many believe the GDI was designed from the beginning to run on 91 octane and has been "stunted / compromised" to (just barely) run on 87.
11-14-2014 07:28 PM
W13FOCUS New Mexico is at 5,280 feet...
11-14-2014 04:11 PM
coldbear I'm careful not to put anything lower than 89 in my lawnmowers. I hate alcohol in anything other than NHRA race cars.
11-14-2014 03:37 PM
stuff1138 I read somewhere that 86 octane is sold in higher altitudes.
11-14-2014 03:32 PM
W13FOCUS It's 86 here in New Mexico. They only have unleaded and premium at Costco.
11-14-2014 03:19 PM
coldbear 86 octane?? Now that's got to be a power adder. I thought that was the alcohol modified fuel used in Prius only. Learn something new everyday.
11-14-2014 01:25 PM
W13FOCUS honestly... in the 8months ive had my 2012 focus i have used various octanes from different places. and i have been using Costco gas 86 octane and i get better mileage and performance than any other place i have used, i urge anyone who has a costco membership to use their fuel. its also cheaper. and after a few tanks you will notice a difference as well... its the best!
11-13-2014 08:03 PM
Originally Posted by coldbear View Post
Sorry Dyno...this cat is running a 15.5 gal. scca certified.
Why do you keep posting in here if you don't own or know anything about a Mk3?
11-13-2014 07:59 PM
Originally Posted by Kona blue sel hatch View Post
You'll find nothing but anecdotal evidence in this forum. Other motors such as the FoST were designed and tuned to perform better with premium but the manufacturer says you can run 87. With the SE, Ford says you can use 87 but no one has gathered any scientific evidence to show that higher octane boosts performance or increases efficiency (enough to pay the extra cost). Since it only costs about $3 or 4 extra per tank, try it for yourself.
So the owners manual is lying? Also if many, many people say it helps, especially with their DCT, is it really anecdotal evidence any more, especially after the original owners manual clearly states "Premium fuel will improve performance". Also my fillups are about 10 gallons and I pay only $.20/gallon more so my math tells that's only $2 more a fillup. With a high compression direct injected motor, why be so cheap?
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