Set yourself a routine. I used to check mine every 3 months because of the conditions here, but found that to be too often. Now I just check every 6 months. Our thunderstorms here in the summer are absolutely disgusting. There is always wind involved, and that wind picks up salt from the salt flats that extend from here to 120 miles west of here. Then, once the storms hit the Great Salt Lake, they "suck and blow" a ton of the surface water all over the valley. So, after a bout of windy conditions, all the cars get covered in a fine layer of crud. If it rains, then it looks like I parked under the roost of 5,000 seagulls: salty crap splattered all over the Pathie. Because of all this, I tend to check a number of things on mine fairly often.coom1986 wrote:One more thing, I live in Dubai where the weathers pretty dusty with the occational sand strorm. How often do you think i should inspect the filter.