Originally Posted by a2cpc (Post 1350692)

It is a peace of mind thing for me, but it doesn't HAVE to be done, but it won't hurt.

Originally Posted by Gary in NJ (Post 1350725)

Actually, it could. The oil in factory new engines contains an oil additive to help with break in.

Stick to the factory recommended intervals.

Originally Posted by bluesubie (Post 1351387)

Oil color doesn't tell you whether or not the oil needs to be changed.

-Dennis

Originally Posted by wrussi (Post 1351431)

1000 miles for my first one with 5w20 non syn and i just did my 5000 miles full syn 5w20

Originally Posted by sierra (Post 1351430)

Without paying someone to analyse the oil the colour, feel and smell are what we have to go by. If it's black I doubt an analysis will say it's good to leave and I certainly wouldn't leave it in my engine.

Originally Posted by sierra (Post 1351430)

Without paying someone to analyse the oil the colour, feel and smell are what we have to go by. If it's black I doubt an analysis will say it's good to leave and I certainly wouldn't leave it in my engine.

Originally Posted by bkblitzed (Post 1351138)

I did mine around 1500 and I had flakes and the oil was pitch black. So I would do it soon

Originally Posted by DoomsdayJesus (Post 1352041)

If you're worried about debris in your oil just swap filters halfway between oil changes. It's too easy on this car. There's no need to change it early.

Originally Posted by Dr. BRZ (Post 1350468)

its a boxer, so oil change every 7500 miles.

Originally Posted by Suberman (Post 1351490)

Once every 6 months or 5,000 miles is VERY conservative. Most engines spec once per year or 10,000 miles and my new Jaguar is once per year or 15,000 miles.

Originally Posted by sierra (Post 1351443)

They say that it needs a fully synthetic oil to be able to cope with the high oil temperatures in these motors.
If that's the case then 4000 miles using mineral oil might not have been the right thing to do?

Originally Posted by 993Fan (Post 1352230)

Some 911 models had a 20K interval. Of course, they also had a lot more oil.

Originally Posted by wrussi (Post 1352237)

factory oil is non syn and trust me the one that they put at the scion service center wont be synthetic either unless you ask and pay extra for it.

Originally Posted by wrussi (Post 1352237)

factory oil is non syn and trust me the one that they put at the scion service center wont be synthetic either unless you ask and pay extra for it.

Originally Posted by bluesubie (Post 1351468)

Just take a look around at the uoa's on this site. If it is black, that could mean that the oil is doing its job holding the contaminants in suspension. That could happen in as little as 2,000 miles on an oil that still has a strong TBN to handle another 5,000 miles. There's no sense in speculating when it's very easy to obtain data or spend $25 or a used oil analysis including TBN. -Dennis

Originally Posted by SirBrass (Post 1352335)

Stock subaru oil is indeed synthetic. And it's essentially re-branded mobile 1.

Sent from my SCH-I535 using Tapatalk

Originally Posted by sierra (Post 1352537)

Why not spend the money on an oil change instead?

Originally Posted by bluesubie (Post 1352933)

Actually the factory fill for both cars is Idemitsu. The dealer service fill for the Subaru is also Idemitsu and the dealer service fill on the Scion is made by Exxon Mobil and is a different formula than Mobil1 0W-20. :)


In the context of the original post, because the factory fill has higher levels of some anti-wear additives (like molybdenum and zddp) than the oil that you can get from the dealer and it is beneficial to follow the OEM's recommendations during break-in instead of going by how an oil looks or because someone thinks there's a lot of metal in the factory fill.

And in the context of changing oil too early in general, because the SAE has written papers on how used oil can be better than new. It can take mileage, time, and heat for the additives in oil to activate.
Used oil better than new?
This can be seen in cases where someone does uoa's at say 1,000 mile intervals but does not change the oil. The first few uoa's can show higher wear metals than the uoa's towards the end of the interval.

And because it's just a waste to change oil too early.
http://www.edmunds.com/car-care/stop...-your-oil.html

-Dennis

Originally Posted by sierra (Post 1353042)

So when I was an apprentice and broke, using used sump oil from the service station waste tank to top up my knackered engine, I was unwittingly doing the right thing.

If that is correct we should only replace 50% of the old oil to protect the engine until the new oil starts doing its job properly.

Originally Posted by Suberman (Post 1353108)

Not a problem if you drive a pre 80's Alfa Romeo, the oil leaks and burns so fast you only needed to top up and change the filter periodically. No drain plug was needed.

Originally Posted by PERRIN_Chris (Post 1369070)

Subaru recommends the first oil change at 3,000 miles, then at 7,500, and every 7,500 miles after. You can stick to that and you'll be fine.

Originally Posted by Zechs21 (Post 1375447)

I want to change oil filters without replacing the oil. If I unscrewed the filter without emptying the oil, will the oil spurt out?

Originally Posted by ndsleep612 (Post 1376048)

I did mine around 3500. Let's just say that the oil was DIRTY. If Toyota "recommends" 7500, I seriously doubt they care about the longevity of their customer's cars. Basically if the engines blow, more sales.

Originally Posted by ndsleep612 (Post 1376048)

I did mine around 3500. Let's just say that the oil was DIRTY. If Toyota "recommends" 7500, I seriously doubt they care about the longevity of their customer's cars. Basically if the engines blow, more sales.