[turboranger]

i think valvoline oil is factory fill, right?!?!?

[Walt]

Synthetic oil has been thoroughly proven in racing and high-performance for three decades. Except for break-in, synthetic is all I have used since 1978 in many performance vehicles. You can't buy better engine protection than Redline and Mobil 1 EP. Both have been recommended to me by major engine builders.

[seta311]

when i went to get an oil change at the dealership close to my house, they told me that they can use synthetic, but i would be voiding my warranty. She (the service advisor) also said that the if i read the manual I would see it. I pulled the manual out of my car and told her it clearly does NOT say not to use synthetic and says nothing about voiding warranty. I don't know what these dealerships are smoking.

[Blackfang]

Originally Posted by seta311

when i went to get an oil change at the dealership close to my house, they told me that they can use synthetic, but i would be voiding my warranty. She (the service advisor) also said that the if i read the manual I would see it. I pulled the manual out of my car and told her it clearly does NOT say not to use synthetic and says nothing about voiding warranty. I don't know what these dealerships are smoking.

She is a moron.

[SiR-ed8]

Originally Posted by Crewchief

The STi comes stock running mobile one sythentic 5w-30. WTF? lol

Where do you get your info from? After the break-in period i changed it to mobile 1 full synthetic. I never went back ever since. If I drive severely I change every 2500. Otherwise i change every 3000-3500.

[Seppo]

I was also told by the dealer that there is no reason to use synthetic. But i see what Blackfang is saying, its not the oil, it's the extended intervals because people think they can get away with not changing their oil for a while since they use synthetic. Also if you change your oil every 2500-3000, it can get quite pricey to use synthetic, thats why i am going back to regular.

[holycow]

Originally Posted by Shakes

(M3 is in the 10k mile range) but that is just stupid.

Not necessarily. In my R32 running the 3.2l VR6, the oil change interval is 10,000 miles, and you must use a vw approved 0-40 synthetic oil. When I drained my oil after 10k miles, it wasn't all that dirty at all. It actually looked pretty good! Far cleaner than the oil I just drained out of my STI after only 5k miles.

Im sure a lot of that has to do with engine design, what oil you can use, and whether ithe engine is NA or Turbo. Differently engineered engines will wear and ditry the oil at different rates... obviously by a considerable margin.

[mofoSTI]

I remember my old boss telling me that his friend only added oil as needed. He had a geo metro with 90k on it and the factory filter.

[STi_4_Daddy]

Originally Posted by mofoSTI

I remember my old boss telling me that his friend only added oil as needed. He had a geo metro with 90k on it and the factory filter.

Sounds like a friend of mine with a '94 GSX(Eclipse) bought it brand new and still to this day ONLY adds oil.

[Real Deal]

my dealer uses castrol syntec blend

[twigg107]

Reminds me of the guy on nasioc who didnt change his oil for 25k miles because the dealer side he could!!!! lol

[STISubSilver]

Is Castrol synthetic blend okay for the STi's?

[Icereaperx303]

I use the castrol synthetic european formula 0w-30

So far so good.

[sbstiguy]

5w-30 Mobil 1, 44k miles and going strong, change it every 3-3.5k miles

[sbstiguy]

Originally Posted by STi_4_Daddy

Sounds like a friend of mine with a '94 GSX(Eclipse) bought it brand new and still to this day ONLY adds oil.

Reminds me of the days of my RX-7 with the oil metering pump...we don't need oil changes! the car does it for us, just keep a bottle with ya, every time you fill the gas tank, you fill the oil (and yes I'm totally joking)