Hi there,

Was just wondering if anyone uses an additive on their Mk2 vRS, and if so, which one?

Thanks.

Paul

None.

And tbh, if you're managing 35mpg why bother?

I've used BG44K recently & am going to try archoil ar6400 next due to recommendations on here.

They are both fuel system cleaners, both have good reviews.

Do you need this if you put Vpower etc. in your car every so often? I thought one of the advantages of the premium fuels was the cleaning agents they add to them.

I only use v power, bp ultimate or momentum 99 but every 3 months or so bung 1 of the above in.

Having done a bit of reading it appears that BG44K is little more than a purified Redex type mixture and while this does have proven benefits it is rather expensive. AR6400 however is one of a newer technology additaives that contains PEA (polyetheramines) that have an improved effect against deposits vs. the older additives

None.

And tbh, if you're managing 35mpg why bother?

Haha thanks although due to limited finding and small journeys this week, it has shot down to 22 mpg.

Cheers for the advice guys.

I occasionally use a Lucas octane booster if I can't find super unleaded, I've found it cleans things up quite well removing carbon as well

Having read the discusion before refrence to use or not to use the dearer fuels, can anyone clarify that we should be using this instead of regular unleaded or is regular ok (maybe not ideal) ??

Answers on a postcard please.

Having done a bit of reading it appears that BG44K is little more than a purified Redex type mixture and while this does have proven benefits it is rather expensive. AR6400 however is one of a newer technology additaives that contains PEA (polyetheramines) that have an improved effect against deposits vs. the older additives

BG44K has worked in two of my families cars it reduces and clears carbon well and it does work

Archoil on the other hand contains PEA as you mention and is looking really good in terms of the cleaning its far better combustion is leading to a great performing product.

I my self have ordered a few bottles yet to put them in though.

Skoda do not reccommend using any fuel or oil additives in any of there engines, in fact if you had any warranty issues with the engine and skoda asked the dealer for a sample of fuel or oil and found out that you had used anything they would use it against you and kick it straight out.

Having read the discusion before refrence to use or not to use the dearer fuels, can anyone clarify that we should be using this instead of regular unleaded or is regular ok (maybe not ideal) ??

Answers on a postcard please.

I've run both my octavia on bog standard 95 Ron without issues.

It won't damage the engine, you'll just notice a little bit less oomph in certain ranges.

The 1st tank or 2 will run like a bag of nails, but after that the ecu should sort itself out and run fine.

i cant see how adding additives to a direct injection engine can bring about too many benefits. My thoughts behind this are that the injector is in the combustion chamber so no fuel/ additives will be flowing over the intake valves and doing any cleaning.

I can see how some additives can add small performance advantages due to them adding octane and therefore increasing the knock resistance of the fuel.

Any other thoughts from anyone else??

Skoda do not reccommend using any fuel or oil additives in any of there engines, in fact if you had any warranty issues with the engine and skoda asked the dealer for a sample of fuel or oil and found out that you had used anything they would use it against you and kick it straight out.

My book says that the 2.0 TSi engine can be run on E10 unleaded without problems. This is regular unleaded with 10% bio ethanol added.

My book says that the 2.0 TSi engine can be run on E10 unleaded without problems. This is regular unleaded with 10% bio ethanol added.

Fair enough but thats not Joe Bloggs going into Halfrauds and buying additives, its fuel manufactures mixing to safe limits.

i cant see how adding additives to a direct injection engine can bring about too many benefits. My thoughts behind this are that the injector is in the combustion chamber so no fuel/ additives will be flowing over the intake valves and doing any cleaning.

I can see how some additives can add small performance advantages due to them adding octane and therefore increasing the knock resistance of the fuel.

Any other thoughts from anyone else??

It will keep the injectors clean and minimise any potential carbon build up in the combustion chamber? Good point about the valves though, but I assume that as there is no fuel charge passing over them, they shouldn't get contaminated. (I think they get dirty on a non DI system when the engine is cold and then cold, enriched charge probably leaves them 'wet' with fuel mist. This will then boil off rather than burning leaving traces of residue. Over a period of time, particularly in a vehicle that does lots of short journeys, this trace residue will build up on the back of the inlet valves)

It will keep the injectors clean and minimise any potential carbon build up in the combustion chamber? Good point about the valves though, but I assume that as there is no fuel charge passing over them, they shouldn't get contaminated. (I think they get dirty on a non DI system when the engine is cold and then cold, enriched charge probably leaves them 'wet' with fuel mist. This will then boil off rather than burning leaving traces of residue. Over a period of time, particularly in a vehicle that does lots of short journeys, this trace residue will build up on the back of the inlet valves)

Thanks to EGR valves and ever tightening emissions, the crap that doesn't get burnt is passed around and goes through the inlet valves. Also the crankcase vents into the inlet. On direct injection engines the fuel charge doesn't wash this off and therefore they are more likely to coke up on the inlet.

Edited 4 February, 201313 yr by Metblackrat

Thanks to EGR valves and ever tightening emissions, the crap that doesn't get burnt is passed around and goes through the inlet valves. Also the crankcase vents into the inlet. On direct injection engines the fuel charge doesn't wash this off and therefore they are more likely to coke up on the inlet.

So what you get on the one hand is taken away with the other! Not good. Is this mainly a diesel issue?

So what you get on the one hand is taken away with the other! Not good. Is this mainly a diesel issue?

nope. Any direct injection system gets this.

So it begs the question, is it worth doing the mod to redirect the vented gases/oil vapour/moisture to atmosphere (via a catch can or not) for the longterm health of your engine? Also, the routing of the crankcase breather is obvious and presumably is all you can do (having read about the EGR valve/system it seems critical in controlling burn rate and temperatures as well as NOx) but how is the EGR valve routed? Does this route directly to the manifold seperately?

Cheers