Castrol oil suggests 30,000 miles to change air filter.Does this seem right.I drive through no dusty areas.Thanks Joe
Air filter change interval?
- Thread starter Dually
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Dually;
In my limited experience, 30K has been a conservative interval. Usually a black crud spot where the air enters the airbox and not a lot of other dirt.
I did rent a car one time with right around 30K...had to check the air filter and it was absolutely disgusting, looked like someone raked their leaves into it.
If it is easy to check, I'd recommend taking a look at 20K, and unless there are actually things living on it you should make it to 30K.
In my limited experience, 30K has been a conservative interval. Usually a black crud spot where the air enters the airbox and not a lot of other dirt.
I did rent a car one time with right around 30K...had to check the air filter and it was absolutely disgusting, looked like someone raked their leaves into it.
If it is easy to check, I'd recommend taking a look at 20K, and unless there are actually things living on it you should make it to 30K.
vad wrote:
SAE have repeatedly proved this via multiple testing.
New air filters are inherently less efficient than used because of lack of gathered dust particles in filter media. To a point, those gathered dust particles in a used filter serve to enhance filter media efficiency.
Agreed.
SAE have repeatedly proved this via multiple testing.
New air filters are inherently less efficient than used because of lack of gathered dust particles in filter media. To a point, those gathered dust particles in a used filter serve to enhance filter media efficiency.
My gm 3.1 looks pretty bad at 15K and I change it but my 2.2 Mazda must not suck as much air because on a similar sized filter it looks new at 15K. I am doing enough UOA now on the GM to check for coolant leaks to give me feedback on air filters now too.
Perhaps that is true, I've read plenty of the support on this board for the longer air filter use interval. The problem I have with my car though is in 15k miles my car distorts the **** out of the pleats on my filter. I also haven't been able, through oil analysis, to see any difference between old and new air filters on a UOA for my application.
I usually change the air filter in the Spring after the pollen has subsided. I usually change it in the fall as well. I drive 35-40K in a year, so this equals out to about 20K on an air filter.
I recently installed a PureOne air filter and was impressed with the quality.
I recently installed a PureOne air filter and was impressed with the quality.
Problem is, once you start seeing a marked improvement in the filtering ability due to fouling, the fouling rate usually increases exponentially. Likewise, the air flow (thus vehicle efficiency) decreases on a similar trend. The best filters would be those that load at a linear rate over their service life.
I changed mine out at 20K. It was quite dirty, and I don't drive in dusty conditions?
Driving in urban areas can also cause a filter to become dirty pretty quickly. I have always been amazed at how quickly the air filter in my mom's truck turns black. The truck rarely ever sees a gravel road, but it is in heavy traffic (among busses and dump trucks) everyday. Air filters never last more than 20K in it. On the other hand, my truck sees many gravel roads, but also many open roads. Its air filter usually has plenty of life left at 20K.
I suggest you change filters when the gas milage starts to drop. This is usually 50,000 plus in my area. UOA's get better as you get closer to the 50,000 mark. This of course is in my area of clean air in Eastern North Carolina.
Your results may vary.
Your results may vary.
Since air filters improve with age (up to a point.)I just go with my manufactures recomemdation of 30,000 mile. If I drove dirt road daily maybe I'd cut back to 20,000 or so. I think TR3 has the idea but, I prefere to not wait so long to see milage drop. Maybe a differental presure gauge would be best.
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