Hi all,   Just been looking over my MOT emissions printouts from last year and now. Been using a fuel additive for a year now,  

 

My emission report from last year was --       Test limit applied;  1.50  1/m

                                                                       Absorption coefficient;   1.30  1/m              zero drift;      0.01    1/m

 

 

This year after using the additive--                 Test limit applied;        1.50  1/m

                                                                       Absorption coefficient; 0.25  1/m                Zero drift       0.00     1/m

 

Test type applied; Fast pass.

 

 

Test result;           pass.

 

 

I have not got a clue what these figures mean, But some of you will know.. Does this show that the additive that i've been using is actually doing something or are there other things to be considered ??  Just very curious..  

Very interesting! I too would like to know what those figures mean, but as they are lower, could that mean it has made a positive effect?

 

What additive are you using? I've been using Diesel Rhino for the last 5k miles.

I'm not sure of the reason behind it but Skoda do make a specific mention in their owners manuals that either fuel or oil additives should not be used.

It's Millers diesel power max, Been using it just to try and keep the internals of the engine clean, And yes Silver, I notice in the cars handbook that additives are not recommended but i suppose that is just covering their ar*e sort of thing  .         I've also noticed with mine that when ''putting me foot down'' there's no huge clouds of smoke billowing out the exhaust, Unlike some other diesels i've seen.   plus i change the oil and filter twice a year using long life low soot 507 oil, So don't know if that might be helping too.

A quick Google search suggests the absorption coefficient is closely related to the amount of smoke emitted.

 

During the second MOT the machine recorded a lower amount of smoke being emitted from the tail pipe than it did during the first MOT.

 

I guess it would be difficult to attribute this to the additive alone? Non DPF equipped diesels can smoke differently from day to day.

 

"Basically the diesel smoke tester is checking that the exhaust is not producing thick black smoke. It does this by means of a light sensor.

 

If your exhaust smoke is thick and black it will absorb lots of light, so your absorption coefficient will be high and your car will likely fail"

 

I thought that the current limit was 3.00 l/m (litres per minute) but your print-out suggests it is now 1.50 l/m.

 

Either way you've seen a sizable reduction in the smoke out the back of your car.

Edited 10 July, 201510 yr by silver1011

Yeah looking through google my car should have been tested at the 3.00 1/m            But it's been done at 1.50   1/m    Either way i think it's pretty good for a 10 year old car but don't know if the Millers additive has anything to do with or not.

Been using Millers ecomax in mine for the 3 years I've had it and the emissions have got lower each MOT. In fact at the last one it was that low it was put down as an advisory because it wasn't a high enough value to trigger the machine to produce a print out.

I too have been putting millars in both our cars and certainly in my CR it seems to make the engine run smoother. I too have seen the 'get out clause' from skoda saying you shouldn't use additives but IIRC it also says not to use biodiesel too which is impossible as the eu make the fuel companies put it in. Mine is up for it's 1st mot this year so no idea what its imissons will be but the old pd in the seat is always well under. I bought 5l of the stuff so have enough to last for a while!

And the powers that be keep preaching to us that a diesel car is a dirty polluting piece of machinery, Seems using these additives and a bit of TLC can make us oil burners as clean if not cleaner than our petrol burning counterparts