Just had an oil change

[donv]

Did you change viscosity? If not, I'd be concerned if you could "feel" the difference after a change - it would mean a perceptible difference in engine friction and that would imply significant wear exposure before (I presume you mean it feels better now). I'd do more frequent changes in the future and just keep repeating to myself "placebo effect" to keep my thoughts off of what could have happened up to now. I'm doing 1 year/~5K miles (works out to about the same thing for me) with the synthetic (DD w/conventional gets 3K).

Originally Posted by Perfectlap

huge difference felt after oil change its the 3rd for my 2000s with 25,000 miles.
Is 10,000 miles/1 year too long an interval?
I think Porsche claims 15,000 miles.

[Pilot2519j]

Change once a year. I am driving about 6,000 to 7,000 per year at most now. I use the car as my daily driver about 20 miles a day or so. Fuel up every other week.

[Perfectlap]

no they use black cap Mobil 1 at the dealer. Same as the last oil change.

I'm thinking that the oil filter may have quit a bit sooner.
Probably safe to change the the oil for 10,000 miles (once a year) and change the oil filter every 5,000 miles or every six months. Changing the filter in between oil changes seems like the best option.

p.s.
I think my culprit was a dirty air filter and not the oil. I waited 10,000 miles too long. I think 15,000 miles as per the factory is pushing it to begin with.

[Chris C Atlanta]

I target once a year or approx. 5K miles on my cars...DIY and it's cheap insurance

[Uncle Bob]

I'll get mine done next week when they do the oil pressure relief valve repair. http://www.renntech.org/forums/index.php?showtopic=8166
I checked the build date, it's 5/05 on my car. Close enough to a year for me.

[fab]

oil changed once a year. I only drive approx. 6500 a year.

[smith12895]

What about the 987's? The manufacture says you only need to do oil change every 20K miles. Are they full of it?