Last post on Sep 05, 2011 at 4:13 PM
You are in the Toyota Echo
What is this discussion about?
Toyota ECHO, Fuel System, Fuel Efficiency (MPG), Sedan
Nov 07, 2010 (5:00 pm)
We have 04 Echo 5 speed. We get 32 mpg city to 48 mpg hwy. We use 92 or 93 octane. Owners manual calls for at least 91 octane. No power with lower octane. Look in your manual and see for yourself.
#397 of 435 Re: Octane [moparblue2]
Nov 07, 2010 (5:09 pm)
Which method of calculating Octane do you use? RON, or MON, or the US method of averaging the two different numbers? (R+M/2) We typically see 87, 89, and 91 sold at pumps here.
87 (R+M/2) is typically the same as 91 as calculated with the RON process.
"Gasoline pumps typically post octane numbers as an average of two different values. Often you may see the octane rating quoted as (R+M)/2. One value is the research octane number (RON), which is determined with a test engine running at a low speed of 600 rpm. The other value is the motor octane number (MON), which is determined with a test engine running at a higher speed of 900 rpm. If, for example, a gasoline has an RON of 98 and a MON of 90, then the posted octane number would be the average of the two values or 94."
Nov 07, 2010 (5:43 pm)
Hmmm yeah i dont believe I've ever even seen 93 octane. But my cars have always run great on the cheapest gas I could find.
#399 of 435 Re: Octane [dephinusorca]
Nov 07, 2010 (5:53 pm)
I've driven the Echo for 10 years on the lowest grade of gas sold, and gotten consistent 40-41 MPG with US gallons. I don't run AM/PM mini mart gas, as my mileage always was less, running that fuel. First brand to routinely use 10% alcohol in the US.
When the mandatory federal 10% alcohol add was done a few years ago, my MPG went down 4 MPG, running the lowest grade of fuel. High 30's, rarely seeing 40. When I had been getting 43 MPG doing mostly highway driving.
Just started using the mid grade gas.... first time I refilled the tank at the half way point, I was getting 43 MPG.
If this holds up through a few tanks, it will work out to lower costs and less fill ups for me than running the lower grade gas.
#401 of 435 Re: octane [kneisl1]
Nov 12, 2010 (9:05 am)
this does make sense as colder air is more dense which make the computer add more fuel.
#402 of 435 Re: Octane [rj2112]
Nov 12, 2010 (2:37 pm)
Update: Just re-filled with 89 Octane, and calculated the MPG... 43 and change.
388 miles on 8.9 US gallons.
#403 of 435 Re: Octane [rj2112]
Feb 04, 2011 (7:04 am)
We have 2004 Echo in winter we get better MPG with higher octane. If u look in owners manul is tells u to use 91 octane or higher. We had new 2000 Echo it got better milage then r 04. Don't figure
Feb 04, 2011 (8:29 am)
Maybe less alcohol in premium? That is the mpg killer. How much does your MPG vary summer to winter?
Feb 05, 2011 (5:43 am)
It is as much as 10 mpg less. Must be alcohol. Summer we use ac that should drop mpg.