Its not much but it makes a Big difference!

[1985K20]

I know yas all know that but just to refresh our memories

I tought i'd let people know that just buy replacing air filter + crankcase filter
I got a fuel mileage increase of at least 30 percent driving around town and got rid of my miss at idle...after replacing plugs,cap,rotor for nothing

All that caused by a dirty filter

 

[sled_dog]

when replacing stock parts with stock parts is a performance improver