When to do your first oil change, and why...
 

I've seen many on here recommending your first oil change at 1,000. I'm of the opinion that you should wait til 3,500-5,000 miles to do your first change. Here's why: The factory fill is 0w20 synthetic, so it's not dino oil. There may very well be small metallic shavings from break-in, but those all should be caught by the oil filter. The main reason to leave it in the recommended interval is this:
The above is an oil analysis done of a factory fill from a FB25 in a 2011 Subaru Forester. It was taken from http://www.bobistheoilguy.com/forums...Number=2251431.

What do these numbers mean? Basically the Moly, Zinc, and Phosphorus are higher than normal oils. This seems to be part of a stronger additives package put in to the factory fill.
Is this being super anal? Sure it is. That's why we're all on this website, specifically in this subforum :D

If you changed at 1,000 miles will you ever notice a difference? Probably not. I just posted this as food for thought.

Thats not too bad of a UOA, however after only 1400 miles its already a thin 20 weight oil.

Iron and Copper are already a bit high (due to break-in obviuosly).

How thin will the oil be and how many ppm will be in there at the 7500 mile recommended first oil change?

I would just assume get that stuff out of the engine.

Edit: I am interested in seeing more UOA's from our FA20 to see whether the DI has fuel dilution issues just as nearly every other DI engine does.

I haven no idea what your post just said lol. I just got an oil change though at around 1600mph based on what other members have said regarding the metal shavings.

Whoa that's fast!

Well, with scions complimentary service for first two years or 25,000 miles, every 5,000 miles is recommended by them, and it's free. So that is the route I will take. 5k, 10k, 15k, 20k etc..

I did ask the service tech about @ 1K, and he told me that's "old school'....

The first oil change is 7500k

On that note I thought I link my post again to this guys oil quiestion. Also it's an area go get something new for the car you may not have thought of. not to mention maybe some extra insurance for those that plan to keep thier cars a long time. I did them to my Z:
http://www.ft86club.com/forums/showp...86&postcount=3

changed oil at 1000 miles for break-in purpose and because it was free (you got to work your service rep ;) )

and i can vow for it, the engine came alive afterward :)

My god who is your mechanic .. able to expel oils and replace the oil and oil filter all at 1600 mph!:burnrubber: :clap:

I've been debating doing it at 1k or 3k ...

I think if this were beneficial low production high end sports cars like the Corvette ZR1, M3/5, GTR, etc. would recommend an early first change, but they dont. So I wont change it early. And how do we know the moly is part of an additive package as opposed to being left over from assembly lube or normal production process.

you made me lol!

it's known as oil sample testing

there are a number of places that do it

they take a small sample of your oil and analyze it's contents. This provides a good analysis of your engines overall health, particularly whether you have coolant or gasoline enter your oil circulatory system.

doing an oil test every 10-15k is an effective way to keep tabs on your engines health and provide warning signs to possible problems that will take a lot longer to show up "mechanically"

link no linky

Wierd, I used the link just to my post, heres the whole thing. Mines #3 (so you don't have to fish for it):

http://www.ft86club.com/forums/showthread.php?t=11812