Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 16th December 2008, 01:14   #16
Awaiting Email Confirmation
 
Join Date: Jun 2005
Location: ERNAKULAM
Posts: 947
Thanked: 317 Times
Default change in viscosity

Please note that oil changes viscosity as its used in the crankcase as the lighter fractions evaporate with use and heat.
Very few cars can use Sae50 grade oil one example I can think of is the Padmini. All other cars use sae40 and below.
I am not venturing as to how many days it takes to thicken and by how much but it does thicken and about that I am sure.

One more aspect to consider is that the main crank shaft is dipped in oil accumulating in the oil pan.

Might as well sell the oil to the TAXI fellows than use it in your car how much ever you dislike it. Even though I hate my Junkindica I give it the best mineral oils for its diet and its diet is humongous. It presently consumes 1 ml of engine oil for every 1km. With ordinary oil including the best from Castrol it consumes 1.8ml per 1km and with the best that ELF has to offer it consumes 1ml per 1km.
drpullockaran is offline   Reply With Quote
Old 16th December 2008, 11:01   #17
BHPian
 
Join Date: Aug 2008
Location: Mumbai
Posts: 198
Thanked: 2 Times
Default

Quote:
Originally Posted by Strangerintown View Post
. If you dislike your old car so much, you should really just get rid of it instead of subjecting it to such indignities!


Anyway, I wouldt do it if I were you. Any car I have, old or new, would get the same loving maintenance in the engine department at the very least.
Could not agree more.Any car engine should not be treated in such an indifferent manner.Maybe at the most you could use a less expensive brand for your secondary car but never used engine oil.If you tried to do that here is what the engine will silently be feeling :
maverick030581 is offline   Reply With Quote
Old 16th December 2008, 11:16   #18
Senior - BHPian
 
Join Date: Jul 2008
Location: Bangalore
Posts: 2,035
Thanked: 384 Times
Default

Quote:
Originally Posted by Raccoon View Post
How does this add to pollution? In fact, it might be the reverse - they are using less oil which would be MORE eco friendly (tho they would be shortening their engine life by overusing the oil, but thats another issue). Didn't quite get the logic of that?!
My Hypothesis with no attempt to prove whatsoever : Engine with insufficient lubrication is bound to have more friction so will burn more fuel and emission will be higher so not only engine life is shortened but pollution is also increased if oil is used beyond it's life thus I see too frequent oil changes and using oil beyond life both as eco-unfriendly.

In case the above hypothesis has some flaws please highlight them I would like to be educated on the same.
amitk26 is online now   Reply With Quote
Old 16th December 2008, 12:11   #19
Senior - BHPian
 
Join Date: Sep 2007
Location: New Delhi
Posts: 3,083
Thanked: 252 Times
Default

Quote:
Originally Posted by drpullockaran View Post
It presently consumes 1 ml of engine oil for every 1km. With ordinary oil including the best from Castrol it consumes 1.8ml per 1km and with the best that ELF has to offer it consumes 1ml per 1km.
Your Indica probably consumes less diesel than it would otherwise have!
Surely there is some calorific value in engine oils too!
anupmathur is offline   Reply With Quote
Old 16th December 2008, 15:58   #20
Senior - BHPian
 
Raccoon's Avatar
 
Join Date: Jan 2008
Location: Poona
Posts: 1,832
Thanked: 105 Times
Default

Quote:
Originally Posted by amitk26 View Post
My Hypothesis with no attempt to prove whatsoever : Engine with insufficient lubrication is bound to have more friction so will burn more fuel and emission will be higher so not only engine life is shortened but pollution is also increased if oil is used beyond it's life thus I see too frequent oil changes and using oil beyond life both as eco-unfriendly.

In case the above hypothesis has some flaws please highlight them I would like to be educated on the same.
Have not done or read any tests to prove this, but I'm inclined to think that using engine oil beyond its recommened life would be better from ecology perspective, because I really doubt that engine friction (with overused oil) will go up to such an extent so as to consume significantly extra fuel. I really dont think the impact caused by the bit of extra fuel used can be compared to the impact caused by the v toxic motor oil generated. I'm assuming that the oil is used, say 20 - 40% beyond its recommened life... no telling what will happen if the oil is used indefinitely.
Raccoon is offline   Reply With Quote
Old 23rd December 2008, 18:35   #21
BHPian
 
Join Date: Feb 2007
Location: Pune
Posts: 144
Thanked: 0 Times
Default

Thank you for amply humiliating me on this board. One gentleman even seems to have linked my query with economic downturn.. which I find particularly funny. Anyone who owns 2 cars (or even one bike) can comfortably afford a can of oil. My purpose was only to try to be a bit greener.

Our motherly love for our cars sometimes turns us into worried parents who rush to a doctor at the first sneezing of their child. Indeed, the 5000 kms oil change interval has its own factor of safety of at least 2, which means you can comfortably run a car for 10K kms - This is straight from the Horse's mouth - a TATA engineer who has significantly contributed to the re-engineering of Indica in 2002-06. (I have a feeling that this is gonna take this thread into pro-TATA/ anti-TATA direction).

The point is - 3000 kms old oil isn't too bad I'm only curious to know whether it would be compatible with a diff. model.

Quote:
Originally Posted by Raccoon View Post
I really doubt that engine friction (with overused oil) will go up to such an extent so as to consume significantly extra fuel.
Thanks for understanding. I guess my 'dream' chart is hard to come by.

Last edited by amu1983 : 23rd December 2008 at 18:37.
amu1983 is offline   Reply With Quote
Old 24th December 2008, 10:45   #22
Senior - BHPian
 
Join Date: Jul 2008
Location: Bangalore
Posts: 2,035
Thanked: 384 Times
Default

Quote:
Originally Posted by amu1983 View Post
Thank you for amply humiliating me on this board. One gentleman even seems to have linked my query with economic downturn.. which I find particularly funny. Anyone who owns 2 cars (or even one bike) can comfortably afford a can of oil. My purpose was only to try to be a bit greener.
I fully understood the intention please read my first response again. No need to be humiliated this is just a board

Quote:
Originally Posted by amu1983 View Post
I guess my 'dream' chart is hard to come by.
Any kind of chart is difficult to prepare becuase new version / generation / variation of same brand and model with a different engine can have different engine oil specification.
Also it is not required you just need to open user manual of both cars and check the specified grade of Engine oil to be used.

Quote:
Originally Posted by Raccoon View Post
Have not done or read any tests to prove this, but I'm inclined to think that using engine oil beyond its recommened life would be better from ecology perspective, because I really doubt that engine friction (with overused oil) will go up to such an extent so as to consume significantly extra fuel. I really dont think the impact caused by the bit of extra fuel used can be compared to the impact caused by the v toxic motor oil generated. I'm assuming that the oil is used, say 20 - 40% beyond its recommened life... no telling what will happen if the oil is used indefinitely.

Well as I said i did not attempt to prove any thing but using oil beyond its life means increase in viscosity and also friction which implies fuel consumption now if you want to prove that this is wrong you can happily experiment with your car. Apart from fuel consumption manufacturing stages of engine parts consume energy ( Mining -> refining -> Alloy ingot prepration -> Manufacturing Ingots / longs /flats -> Casting /forging -> Milling/ Machining -> Finishing -> Case hardening -> Packaging -> Transport etc. ) thus unnecessary wear n tear and replacement cycles are also eco unfriendly so overall use of engine oil beyond life is not a green option overall.

Last edited by amitk26 : 24th December 2008 at 10:46.
amitk26 is online now   Reply With Quote
Old 24th December 2008, 11:58   #23
Senior - BHPian
 
nitrous's Avatar
 
Join Date: May 2004
Location: UAE/Lon/Madras
Posts: 6,966
Thanked: 282 Times
Default

Quote:
Originally Posted by amu1983
The point is - 3000 kms old oil isn't too bad
Since you're so sure about it, you can go ahead and fill your zen with the oil from Indica's sump.
nitrous is offline   Reply With Quote
Old 26th December 2008, 00:10   #24
Senior - BHPian
 
Raccoon's Avatar
 
Join Date: Jan 2008
Location: Poona
Posts: 1,832
Thanked: 105 Times
Default

Quote:
Apart from fuel consumption manufacturing stages of engine parts consume energy ( Mining -> refining -> Alloy ingot prepration -> Manufacturing Ingots / longs /flats -> Casting /forging -> Milling/ Machining -> Finishing -> Case hardening -> Packaging -> Transport etc. ) thus unnecessary wear n tear and replacement cycles are also eco unfriendly so overall use of engine oil beyond life is not a green option overall.
True. I did think of that. But then the calculations will become amazingly complex...
Raccoon is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Oil Change : Paid Service vs Buying Oil yourself vs Full DIY neosmart Technical Stuff 77 29th June 2017 11:16
DIY: Mercedes W124 Oil Change & Pela 650 Engine Oil Extractor DeepakMenon DIY - Do it yourself 20 9th April 2017 10:59
Switchgear interchangeability on Motorcycles? rohan_cherian Motorbikes 6 10th February 2016 20:14
Compatibility of Viper 3-Channel Security System with Keyless Entry anachronix Modifications & Accessories 6 31st January 2008 11:01


All times are GMT +5.5. The time now is 17:28.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks