ha I second the age question. mine is not a dd, so I finally got to almost 3k miles and changed the oil. it took me nearly a year to get there.

 

I would like to know what contaminants load up the oil filter. Honda says to change the oil filter every other oil change, or are you saying Honda wants these engines to fail. I have never had a oil filter "load up" even after 100k miles(in my truck). If your oil filter plugs up you have bigger problems to worry about. Honda even says how much oil to put in with or without a filter change(without filter 4.8 qts. with oil filter 5.1 qts.). And the filter I use takes 6 qts. when I change the oil and filter.

ROD

 

I've never done it on my S2000 but I've cut several oil filters in half from other vehicles and found all kinds of metal shavings, and tar looking residue on an engine that appears to be "fine" otherwise.

FIVE quarts of full synthetic oil cost $22 - $40.

ONE good quality oil filter (Puralator Pure One) costs $6

Why would you not change the filter every time?

 

I'm pretty sure the recommended interval from Honda was about 8000mi on dino oil.

 

I use to cut open every filter that I changed(still do on my bikes that have a wet clutch) now I just cut open every other one and I have never found anything in my filters(cars and truck) even after over 20k miles on my pickup. I have a cut open filter in my trunk that I show people at the car meets that I go to to show them what a filter should look like after 10k miles on the "S". It looks the same as a filter that has 1k miles on it, no metal or sparkles on it anywhere. Plus my filter is twice as big as the stock filter for the "S" with over 400 sq. in. of filter material.

I do change the oil filter at 100 miles on a new car and then at 500 then 5k miles just to see how much sand(yes sand) that comes out of new engines.

ROD

 

5000 is my number on my 06

 

Your oil change interval (OCI) should depend on your driving habits and the quality of oil you use. If you don't do a Used Oil analysis, you're just guessing how well the oil is holding up and you are likely being very conservative.

I went 39,500 miles on my last oil change using Amsoil SSO 0W-30. The previous OCI was over 35,000, and my oil was still healthy. I use a bypass filter and a prelube pump which reduces wear particles in the oil but the oil is holding up very well. Here is my previous UOA. I just sent out my last oil sample and don't have the results back yet. I do a great deal of highway driving, so you have to have your oil tested to determine how far you can go.

 

I work for a Honda/Toyota dealership in Seattle and even our techs cant seem to agree on this one. My Father always told me growing up that an oil and filter is cheap while an engine is expensive so I change mine every 3000-3500 miles with Mobil One. It is important to remember that factory recommendations oftentimes stretch times between services in order to show potential owners a low cost of ownership. A good example of this is Toyota's "world standard" full synthetic auto transmission fluid it has no recommended replacement interval and Toyota sealed the transmission which makes checking the level and quality more difficult. Toyota also made the fluid cost a fortune in order to deter dealers from recommending the fluid exchange procedure to customers. These maint intervals are compromised by marketing brass who are trying to keep the cost of ownership low and also banking on the majority of car owners getting rid of there cars after 3 years. Pretty much all of us love our cars, spend hours cleaning and polishing them, lavish them with expensive bolt ons or sticky tires, so why would you take a chance on pushing your maint intervals out longer? From what I have seen at work and learned from my techs: 1: no further than 3,000 miles on conventional oil!, 2: the "blend" oil can be a rip off as there is no required blend percentage so it could be 99% dino oil and 1% synthetic (so I would change it every 3,000 miles), 3: Full synthetic should be changed around 5,000 miles in a higher performance motor. Just my two cents I'm sure I will be called out on alot of this stuff but there you have it

 

amsoil every 3-4k.

 

One test "could" be better than a thousand expert opinions. Not making any recommendations for anyone but here is my stats and works great for me.

On average, 7500 on engine oil changes, 15000 on filters.

178,600 Miles on her using Mobil 1 Syn. Oil analysis done at 175K, wear metals looks just as good as at 50K.

I do however, change out the transmission oil early, 15K with Honda MTF2, still smooth with the high miles. Honda MTF2 shears down quick but works well within that interval.

No problems with 30K interval on the diff. using Mobil 1.

Honda.