I purchased a K&N air filter and cleaning kit for $50 shipped. This alone will last the life of the vehicle.
Pros: lasts life of vehicle
Reviews of K&N air filter
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Only engine mods is a K&N filter...Highway, I have seen as high as 31mpg.
Pros: high MPG on highway
Vehicle:
Volkswagen
I also changed spark plugs, oem bosch are not to expensive at any parts place. I changed the air filter to a K&N, I am running motul diff and engine oils now.
Pros: easy to install
Due to restrictions in SCCA Stock class rules, I only run a K&N panel... though dyno time revealed only marginal hp gains (really, its a poor ROI over the stock paper, but the K&N was part of a diagnostics test my team was doing, so it was free).
Pros: marginal hp gains
Cons: poor ROI
Vehicle:
Volkswagen Golf
Just arrived from ECS, I installed my smoked tail lights on my '08 wagon. Has the Euro version rear fog. When signaling they change from red to amber when blinking, unlike the US version is always red. And the internal housing of the lights that are normally chrome are blacked out. Love'em.
Pros: amber signal, blacked out housing
Vehicle:
Volkswagen Passat
I threw one in my Dakota I had before the GTI and I could notice the difference.
Pros: noticed difference
Vehicle:
Dodge Dakota
You get a few more MPG and with the windows down you can hear the turbo a little better.
Pros: more MPG, better turbo sound
Vehicle:
Volkswagen
You'd have to have the oil really dripping off the filter for it to get sucked in. K&n have done testing , and they couldnt get oil to come off the K&N even when they over oiled it, and even when they did get oil on maf's they still worked fine
Pros: oil doesn't come off easily
Cons: over oiling possible
about 35 mpg freeway & about 27 city/freeway daily driver '89 Jetta 4 door 1.8L originally (bored .020 over) on digi2 with a K&N air filter I'm running nothing but 91-92 octane chevron/shell gasoline.
Pros: 35 mpg freeway
Cons: 27 mpg city/freeway
Vehicle:
Volkswagen Jetta
I have had K&Ns on my last 3 diesels and 2 gas engined cars and they all ran over 300,000km. There is absolutely no evidence of fouling of the MAF, but there was a noticeable increase in power and mileage on each car and the intake track is noticeably cleaner.
Pros: increase in power, cleaner intake
Mileage: 300000 km
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