Crf Hf Sil? - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 05-11-2007, 05:49 AM   #1
Member
 
Join Date: Jun 2012
Posts: 42
Country: United States
Crf Hf Sil?

I did a search for MPG rating on www.fueleconomy.gov for a 91 CRX HF and to show up one is SIL. The SIL gets better MPG but what is SIL?
__________________

ron22 is offline   Reply With Quote
Old 05-11-2007, 05:53 AM   #2
Registered Member
 
jwxr7's Avatar
 
Join Date: Jan 2007
Posts: 291
Country: United States
SIL= shift indicator light I believe.
__________________

__________________
Best tank= 81.23 mpg on july 1st 2008
SAVE SOME GAS, SAVE THE WORLD!

jwxr7 is offline   Reply With Quote
Old 05-11-2007, 05:53 AM   #3
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Shift Indicator Light on Instrument Panel. Click on the link next to SIL on the site and it will give you a run down on what the abbreviations are.
zpiloto is offline   Reply With Quote
Old 05-11-2007, 07:08 AM   #4
Registered Member
 
Join Date: Aug 2006
Posts: 171
Country: United States
Send a message via AIM to Brian D.
"for a 91 CRX HF and to show up one is SIL. The SIL gets better MPG but what is SIL?"

eh? Don't understand your sentence, "...and to show up one is SIL".

The only thing I can imagine is that you're asking why the HF shows up under the EPA reports' MPG rating as having two different ratings. IF this is your question, here's the deal:

The HF came in two different trims (High Altitude / Low Altitude), or 49-state model / California model, if you prefer that language. The High Altitude model has a shorter final drive ratio (i.e. shorter 5th gear) to make power in, um, high altitudes. The Low Altitude model has a really tall 5th gear / final drive. This is the reasoning for the EPA's CRX HF listing as being both 43city/49hwy MPG versus 49city/52hwy MPG.
__________________
GAS GSLR
Brian D. is offline   Reply With Quote
Old 05-11-2007, 08:14 AM   #5
Member
 
Join Date: Jun 2012
Posts: 42
Country: United States
Not sure what to be more embarrassed about the bad grammar or the fact I searched the site and did not see I could click on "Trans Characteristics"

So basically they are saying is people are to stupid to know when to shift without a light.
ron22 is offline   Reply With Quote
Old 05-11-2007, 08:44 AM   #6
Registered Member
 
jwxr7's Avatar
 
Join Date: Jan 2007
Posts: 291
Country: United States
Maybe I should start paying attention to my SIL. I always shift before it has a chance to come on.
__________________
Best tank= 81.23 mpg on july 1st 2008
SAVE SOME GAS, SAVE THE WORLD!

jwxr7 is offline   Reply With Quote
Old 05-11-2007, 10:27 AM   #7
Registered Member
 
Join Date: Mar 2006
Posts: 675
Country: United States
Quote:
Originally Posted by Ron22 View Post
Not sure what to be more embarrassed about the bad grammar or the fact I searched the site and did not see I could click on "Trans Characteristics"

So basically they are saying is people are to stupid to know when to shift without a light.
No. I think what they were attempting to do was to help people who normally rev the engine/transmission pretty high, to shift at a more optimum point, for mileage. In your case, you are probably already shifting at or before that point, so the light is a stupidity light, but eh, at least it's available.

On the HF transmission, I'm a little confused. I know their are the two versions which Brian described, but if I look on carparts.com, they also list a high altitude version transmission, as well as the 49 state version and the ca version. Does anyone have any idea of what the differences are?
Gary Palmer is offline   Reply With Quote
Old 05-11-2007, 11:06 AM   #8
Registered Member
 
Join Date: Mar 2007
Posts: 1,138
Country: United States
I sorta thought that EPA would shift when the light told them to, if it was present. Otherwise, they would shift when they felt like it or when their protocol dictates. So two identical cars (except for the SIL) could have different EPA estimates.
__________________
Bill in Houston is offline   Reply With Quote
Old 05-11-2007, 01:36 PM   #9
Member
 
Join Date: Jun 2012
Posts: 42
Country: United States
Quote:
Originally Posted by Bill in Houston View Post
I sorta thought that EPA would shift when the light told them to, if it was present. Otherwise, they would shift when they felt like it or when their protocol dictates. So two identical cars (except for the SIL) could have different EPA estimates.
Ok so people are not stupid the EPA employes are.
ron22 is offline   Reply With Quote
Old 07-10-2010, 02:34 AM   #10
Registered Member
 
imzjustplayin's Avatar
 
Join Date: Dec 2011
Posts: 720
Country: United States
I know this is an old thread but since I found it via google, I think I should clarify a few things..

Firstly, if you find two models and one has SIL next to it and the other doesn't but otherwise they appear mostly the same, then the distinction is usually whether the car is a "federal" or "california" car. When I say "Federal" or "California" it refers to the emission's standard to which the car has to abide by. At least for Hondas, the "federal" cars come with an SIL (Shift Indicator light) and the "California" cars don't come with an SIL. I have no idea behind their reasoning except it does help with differentiating between the vehicles.

If you care about mileage, follow the SIL light. There are limited circumstances where not following to the light is beneficial, one of them being anticipating traffic, road anomalies, grades (up or down hill) or signals. For the most part though, you want to follow the light because at least for Hondas, the light is not strictly based upon RPM but also on load, if you're driving with a light load, it'll come on sooner and with a heavy load, it will come on later. I haven't definitively proven this (since I don't own a vehicle with one) but it'd be useful if there was some testing for fuel economy as to whether or not following the light or simply shifting earlier improves mileage or not.
__________________

imzjustplayin is offline   Reply With Quote
Reply

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
CSV upload price error PnnyPnchr Fuelly Web Support and Community News 1 08-13-2013 07:40 AM
Please Add Time of Day to Fuel Up Screen xoraclez Fuelly Web Support and Community News 1 03-29-2013 08:03 AM
How do I view graphs on my page? flyingdutchman Fuelly Web Support and Community News 2 08-05-2011 12:54 AM
VX Head Question GasSavers_scostanz General Maintenance and Repair 8 02-17-2007 04:27 AM
thought this article was interesting bagpipe goatee General Fuel Topics 1 09-06-2005 10:57 AM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 04:00 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.