It's that time again! Once again, for those who are unaware, I follow a modified service interval for my oil changes. Rather than Subaru's recommended 6,000 mile interval, I've been doing 10,000 mile intervals. This is made possible by the use of AMSOIL Signature Series 0W-20 oil, which is rated for 25,000 mile interval oil changes under "normal use," and 15,000 mile changes under "severe use." Considering my use case (autocross, ice racing, Chicago [...]

I racked up just shy of 10,000 miles since my last oil change over 6 months ago, which meant it was time to do it all over again. The timing worked out perfectly to allow me to change all of my fluids before the weather got cold enough to make it an annoying task. For those who haven't been following along with my previous oil change posts, I use AMSOIL fluids in the engine, [...]

So this was the oil change I was really looking forward to. As you may or may not know, I run AMSOIL Signature Series oil in this car. AMSOIL claims you can run 25,000 mile intervals between oil changes, or 15,000 mile intervals under severe use. I decided to test their claims, but since I autocross and whatnot, I decided to play it safe and go with a moderate 10,000 mile interval. That is [...]