Oil change intervals - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 01-28-2007, 11:16 AM   #1
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Oil change intervals

I found this formula on a web site. How close is it to your changes.

(Virgin TBN)(10)(oil capacity)(Cubic Inch/Horsepower)(MPG)=oil change.

For my Por Gratis
(9.0)(10)(4)(181/160)(32)=13,032 miles

This, I think is conservitive number.
__________________

zpiloto is offline   Reply With Quote
Old 01-28-2007, 11:23 AM   #2
Registered Member
 
Join Date: Oct 2006
Posts: 245
Country: United States
no way! how can it account for city driving, vs highway driving?? how can it account for diff driving conditions?? heat, cold starts???
__________________

__________________
"Sylvie" 2000 Honda Insight 5 Speed


LxMike is offline   Reply With Quote
Old 01-28-2007, 11:38 AM   #3
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Quote:
Originally Posted by LxMike View Post
no way! how can it account for city driving, vs highway driving?? how can it account for diff driving conditions?? heat, cold starts???
It takes into account the engine size and MPG. Your car running Amsoil according to the formula would need to change the oil at 12,162 miles.
According to Amsoil thats well with in there specs.

The only way to be sure is to do lab work on your oil. Of course this does not takeinto account the calendar limit of your oil.
zpiloto is offline   Reply With Quote
Old 01-28-2007, 12:04 PM   #4
Registered Member
 
zpiloto's Avatar
 
Join Date: Mar 2006
Posts: 1,225
Country: United States
Go here
scroll down to theory number 5. For a better explaination.
zpiloto is offline   Reply With Quote
Old 01-28-2007, 05:36 PM   #5
Registered Member
 
JanGeo's Avatar
 
Join Date: Jan 2006
Posts: 2,444
Country: United States
Location: Tiverton, RI
Send a message via Yahoo to JanGeo
With Synlube you would have changed oil twice on all those miles.
JanGeo is offline   Reply With Quote
Old 01-28-2007, 06:54 PM   #6
Registered Member
 
Join Date: Oct 2005
Posts: 1,978
Country: United States
Temperature Adjustment

I find it odd that the equation doesn't account for ambient or engine temperature. Cold starts and operation in such temps (or even in extreme heat) can effect the longivity of oil (perhaps the fuel economy, based on the assumption that it decreases in cold weather, is a factor)...

RH77
__________________
rh77 is offline   Reply With Quote
Old 01-28-2007, 07:34 PM   #7
Registered Member
 
GasSavers_Ryland's Avatar
 
Join Date: Mar 2006
Posts: 1,325
Country: United States
Send a message via AIM to GasSavers_Ryland
every owners manual that I've read in the past few years told me to change oil every 7,500 miles, unless it was under harsh driving conditions, like stop and go driving, driving on dusty roads, towing anything, exsessive idleing, driving in cold weather, then you should change it every 3,000 miles... I really wonder if you were to put an hour meter on a car, how many hours you would get out of an oil change, and how it would differ between those harsh driving conditions, and the ideal conditions, I suspect it would be a simaler number of hours of the engine running.
GasSavers_Ryland is offline   Reply With Quote
Old 01-29-2007, 06:47 AM   #8
Registered Member
 
Join Date: Oct 2005
Posts: 1,978
Country: United States
TSX Interval Calculator

The TSX has an oil change interval calculator that uses a few variables to perform its own calcs -- the last time it was around 6000 miles (IIRC). I'm curious to know what it uses exactly...may have to do some addl. research...

RH77
__________________
rh77 is offline   Reply With Quote
Old 01-29-2007, 06:56 AM   #9
Driving on E
 
Matt Timion's Avatar
 
Join Date: Sep 2005
Posts: 3,110
Country: United States
My Honda Fit tells me when to change my oil. I'm pretty sure it tells me to do it every 8000 miles. There is an "oil life gauge" built in. Originally I found this annoying, but now I think it's kind of nice.
Matt Timion is offline   Reply With Quote
Old 01-29-2007, 07:38 AM   #10
Registered Member
 
Join Date: Oct 2005
Posts: 1,978
Country: United States
Maintenance Minder

Quote:
Originally Posted by Matt Timion View Post
My Honda Fit tells me when to change my oil. I'm pretty sure it tells me to do it every 8000 miles. There is an "oil life gauge" built in. Originally I found this annoying, but now I think it's kind of nice.
I checked out the Honda/Acura "Maintenance Minder" info on their website. The demo video mentioned that the following conditions are used to calculated oil change intervals:
  • Higher Engine Temperature Operation Duration (length of time in condition -- such as extreme heat and loads)
  • Low Engine Temps: Drip Distance and Time (short trips shorten the interval)
  • Total number of miles driven
  • Time since last change

Of course the last 2 are obvious, but I wonder if it starts out at 7500 miles under "ideal" conditions, and if the time portion just reminds you if it's been 12-months since the last change (as per the manual)

I was surprised that they delved into engine temps as the primary variable, as the average owner probably doesn't care.

RH77
__________________

__________________
rh77 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
Rav4 mpg chucksunder General Fuel Topics 13 06-01-2012 10:07 PM
Help! AlfieGT Fuelly Web Support and Community News 1 05-22-2011 11:35 PM
Need help - my trip odometer was reset Keen4Green Fuelly Web Support and Community News 7 09-27-2010 06:27 AM
Pulse and Glide? Pete7874 General Fuel Topics 24 02-26-2009 11:11 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 12:02 PM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 04:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.