Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
Location: CA Bay Area
Mentioned: 9 Post(s)
Quoted: 1167 Post(s)
Aren't K&N filters, that filter less, so you can gain few extra HP, before you kill the engine prematurely?
The manual gives air filter change recommendations based on statistics.
Like everything in statistics it doesn't match real situation, so you have to evaluate on your own. Driving only on clean freeways I wouldn't worry about 30,000 on air filter.
While on dirt roads -1000 might be too long.
So coming to the point -expensive filters have vacuum indicators, that shows you stages of filter clogging, before turning red, what is signal to change the filter.
I have one of those on my Ford and bought another indicator for $17. When I will find some time -I'll install it on my Mercedes and if I find it easy, than on my wife Mercedes as well. With high filter prices $17 for gauge sounds like good investment.
All oils up to specifications can be used in the car. Amsoil supposable is good oil, but everybody I know is using Mobil 1.