Club 80-90 Forums

Can anyone recommend a good diesel additive that reduces emissions and maybe even helps with the MPG?

Tesco corn oil will cut the cost.

domiles1 wrote:Can anyone recommend a good diesel additive that reduces emissions and maybe even helps with the MPG?

Maybe run a bit of ATF or two stroke oil through it now and again. All thw wonder products on the market are a complete waste of money in my opion. The VW group specify no oil or fuel additives should be used in ANY of their engines.

does such a magical elixir exist....

a good diesel additive that reduces emissions and maybe even helps with the MPG?

i used a bottle of stp diesel from halfords, didnt notice any major change but you have to keep using it every time you fill up
dan

shropshirevanman wrote:i used a bottle of stp diesel from halfords, didnt notice any major change but you have to keep using it every time you fill up
dan

The only change you will see is to your pocket.

i'd deffo reccommend the cooking oil

Rozzo wrote:i'd deffo reccommend the cooking oil

Depends how many spare fuel pumps you have, they all die sooner or later on cooking oil.

My t4 is absolutely loving the veg oil - no weepy pumps on mine. Am def considering going that route and buying a pre-heater.

futurecut wrote:My t4 is absolutely loving the veg oil - no weepy pumps on mine. Am def considering going that route and buying a pre-heater.

It WILL break its just a question of when and how much it takes with like the engine.

all of that additive s h 1 t is a damn good way of making someone very rich. but if YOU want to stay rich, mix your diesel with 50% vegetable oil like everyone else plus you get to erm "save the planet" or something?

"WEAZLECHIN" wrote: plus you get to erm "save the planet" or something?

yeah ...right

On Fifth Gear this week they tested petrol power booster liquid additives including STP and others of the same ilke.
They had some boffins in a research lab test the additives on a dyno. The results were conclusive. All the additives resulted in a 2% reduction in top end power.
So no gain whatsoever.
Probably the same thing with diesel additives.

My dad however runs a 5 cylinder 2.5tdi T4 syncro, he has been retired for some time now and has the habit of writing down all his MPG figures. He has worked out over the last two years that it is cheaper ( very slightly) to run his diesel on BP Ultimate, inspite of the extra cost per litre. BP is obviously a very big company and spends a great deal of money on research, it would appear that they have got it right with Ultimate. It also keeps the inside of your diesel much cleaner. So that is what I would go for.

simon.

I use stuff called dipetane regularly enough. It works well. Cleans the inside of the engine by causing it to burn off carbon deposits. It also gives me an increase in fuel economy. No real noticable difference in power though I have to say. Maybe a little extra torque but thats about it.

I spoke to a diesel injector specialist in Leamington some time ago & he said don't bother with any additives, they don't work & they can damage the seals in your pump.

As for reducing your mpg & emissions, get your engine looked at & maybe tuned by a specialist if it's bad. A £5 bottle of stuff is going to do what exactly? Clean your injectors? The tips may get sooty, but that is to do with poor combustion, so either the fuels not being delivered properly or not being ignited properly.

As diesels are compression ignition, once it's warm it can only be the fuel delivery or the compression (or lack of it) from your engine. Neither are affected by any cleaning fluid as far as I can see. Anyone tell me otherwise?