German Castrol
TECH Veteran
Joined: Aug 2003
Posts: 4,954
Likes: 1
From: Kent WA
I'd say you can keep putting that oil in your car for as long as you like... 
Now, if you're talking about frequency of oil changes, I'd probably use 6k miles/6 month intervals for changing oil and filter... and change at whichever comes first.
Any good synthetic like German Castrol, Amsoil, Redline, Royal Purple, Mobil 1, etc. should be able to make that change interval just fine. Just use a good oil filter at the same time (K&N, Amsoil, Wix, Napa Gold, etc) and you're good to go.
Now, if you're talking about frequency of oil changes, I'd probably use 6k miles/6 month intervals for changing oil and filter... and change at whichever comes first.
Any good synthetic like German Castrol, Amsoil, Redline, Royal Purple, Mobil 1, etc. should be able to make that change interval just fine. Just use a good oil filter at the same time (K&N, Amsoil, Wix, Napa Gold, etc) and you're good to go.
TECH Fanatic
Joined: Feb 2002
Posts: 1,640
Likes: 0
From: Austin, Tx.
