FASTdan
|
| posted on 16/11/10 at 05:11 PM |
|
|
why change the oil to sort emissions?
Whenever a car fails mot in emissions, as well as change the air filter, why is it always suggested to change the oil and filter? What bearing does
the condition of the lubricant have on emission?
Just curious as never really understood it.....
NEW danST WEBSITE NOW LIVE! Bike carbs, throttle bodies and more......
http://www.danstengineering.co.uk/
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
|
|
russbost
|
| posted on 16/11/10 at 05:13 PM |
|
|
If it contains any fuel from previous overfuelling, or simply is past it's best & not doing it's job properly anymore either can have
a significant effect - tho' in either case it would suggest the oil change is way overdue!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
prawnabie
|
| posted on 16/11/10 at 05:14 PM |
|
|
Only reason I can think of is that oil can hold pollutants from blowby.
|
|
|
Benzine
|
| posted on 16/11/10 at 05:14 PM |
|
|
Tiny amounts of it getting through and burning? When I put my volvo 740 through MOT it failed CO with 6%. I changed oil and fresh petrol and got 1.5%
(don't know how much of that was due to oil and how much to petrol though)
The mental gymnastics a landlord will employ to justify immoral actions is clinically fascinating. Just because something is legal doesn't make
it moral.
|
|
|
bigbravedave
|
| posted on 16/11/10 at 05:21 PM |
|
|
It's partly hydraulic tappet related also
|
|
|
big-vee-twin
|
| posted on 16/11/10 at 05:24 PM |
|
|
Cruddy oil will get into the combustion chamber through the crankcase breather wont they fed into the inlet. I suppose a cleaner oil in there would
reduce emmissions a bit?
Question more than staement of fact
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
|
|
|
Agriv8
|
| posted on 16/11/10 at 05:36 PM |
|
|
ls say a lot esspecially if the car burns the oil vapour ( ie they are fed into inlet ) as I belive all modern cars do.
I assume the oil contains a certain ammount HC so suspect the vapour must too.
regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
|
|
|
rusty nuts
|
| posted on 16/11/10 at 07:57 PM |
|
|
Many years ago I worked on a 1600 Capri that had a CV carn on it with a faulty choke, after sorting the carb out the engine wouldn't idle and
the mixture screw had no effect. On checking the oil level it was found to be well over the maximum and smelt of petrol , changing the oil and filter
sorted out all of the problems . Obviously fuel vapour was being drawn in the inlet through the breather system . Have had similar problems with
emissions several times since when changing the oil has helped
|
|
|
Peteff
|
| posted on 16/11/10 at 08:35 PM |
|
|
I've just changed the oil and filter on our car and the previously fast tickover has dropped by 300rpm and the tappets don't tick now
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
mark chandler
|
| posted on 16/11/10 at 09:16 PM |
|
|
When the oil is old in my car +4000 miles the cats rattle when cold, change the oil and it sorts itself out, I think its just about poor ring sealing,
better oil improves compression on idle. Car has done 138k now, afraid next MOT will be a brace of cats as had to play around to get a good reading
last time 
|
|
|
.jpg)
