Which performance air filter do you use or recommend?

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An OEM or Mann Filter Paper filter, changed every 10,000-15,000 miles.

 

Yes I'm serious, it's a lot cheaper than an oiled filter and when you change them every 10-50k miles (or yearly if you do limited miles) then the air flow will be more than fine.

That plus there are no questions are quality of filtration or oil contamination on the MAF.

K&N panel filter, I've had 1 in every car I've owned and never had any issues

K&N panel filter, I've had 1 in every car I've owned and never had any issues

How much is the filter, then the oil ki, then the wash and dry time where you can't use the car?

A lot more than 10 paper filters I would think.

There really isnt any point IMO to change the OEM filter for an oiled one (So called performance filter) ......

.....because in terms of performance, they make no difference at all (proven on a rolling road)

Unless you're looking to change to a full air intake, I would simply use a standard paper panel filter. The 'uprated,' panel filters don't offer any real gains.

 

One thing you didn't mention is what engine this is for?

He has a 2008 Octavia vRS petrol

Panel filters make no power gains. If it's a long lasting filter your meaning go for a k&n panel filter so save changing a paper filter every service .

Put if you get the oil wrong then you either oil the MAF or cause inferior filtration of fine matter.

 

Why bother with that when a yearly change on the normal paper job will be fine (Unless you're doing big miles, then 2 times)

My K&N intake filters very well. Took the cone filter off today and wiped the inside of the intake pipe with a white cloth. No dirt was present; completely clean. Although not massively scientific; it makes me feel confident it's stopping even the finer particles getting through.

I had a K&N in my old car. It helped it to run better and also rev easier

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Before this Octy I had a 2004 54 Vauxhall Vectra SXi 1.9 cdti 150 to which I fitted a K&N Panel Filter and tuning box. On a rolling road day I tested it standard with just a paper filter, with a K&N panel filter including *air box modification* then with a K&N and tuning box. The results showed a clear distinction between each addition:

* air box modification consists of removing a plastic funnel inside the air box allowing the air to circulate the whole panel as aposed to just half.

1st run Standard - 147bhp.

2nd run K&N & air box mod - 159.6bhp.

3rd run K&N & Tuning Box - 186.4bhp.

These results do not necessarily answer the question about a K&N Panel Filter in an Octavia but it definitely worked in my Vectra. Whether it is noticeable or not is only distinguishable via a Rolling Road, but link it with a remap or tuning box and you can expect extra gains once the car adjusts to the modifications.

How much is the filter, then the oil ki, then the wash and dry time where you can't use the car?

A lot more than 10 paper filters I would think.

I've bought my car with 25,000 miles on it and I've only just turned over 70,000. I regularly check it for debris when I service the car and only once recently have I hoovered it to which was completely unnecessary. They don't generally need cleaning and re-oiling until they have covered 50,000 miles but every car is different.

Cost wise I paid £22 on eBay from a seller who bought it but never fitted it as he sold his car. New ur looking at £36 but they will last 10 times as long as a paper filter and are proven to provide better air flow.