Engine Oil

[Halon]

My understanding is OEM Mtisu = WIX = Napa Gold.

TALON:
Napa Gold Filters (I run an RX-7 filter)

I usually run either 10W-40 or 15W-40. I usually run whatever synthetic is on sale, with the exception of M1 (I never run it because of lifter tick issues I've heard of). I have experimented with some diesel oils too like Rotella, and have nothing negative to say.

I change the oil usually right in the spring, then sometime mid/late summer, and that's usually it. Simply because it doesn't get driven in the winter, but it does see some abuse during the summer.


ENVOY/DD's:
Walmart Supertech Filter

Walmart Supertech Conventional 10W-30. Great bang for the buck, for a vehicle that's simply a DD and doesn't see a lot of abuse.

Oil Change is done appx every 5-7k miles as 3k is way too soon.

[Kracka]

Originally Posted by Halon

My understanding is OEM Mtisu = WIX = Napa Gold.

I doubt this is true since Mitsu filters are made in Japan. WIX does manufacture Napa's filters though. One feature that I really like about the Mitsu filters is they are pregreased then sealed with plastic. I am basing my info off the Evo filters though and it is possible the DSM/other filters are from elsewhere. For example, the only Honda filters made in Japan anymore are the S2k filters, the rest are Fram junk. Subaru recently switched from Japanese made to Fram junk too.

[mlomker]

Originally Posted by Halon

I change the oil usually right in the spring, then sometime mid/late summer, and that's usually it. Simply because it doesn't get driven in the winter, but it does see some abuse during the summer.

I was planning on the same schedule for the Evo.

What's your guys' opinion on putting synthetic in a higher mileage motor? Is the fear of doing that real or imagined? I ask because Amsoil advertises their 0w30 as having a 17,500 mile change interval on motors with more than 100k miles on it. Throwing that in my beater and changing it once per year is kind of appealing.