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Originally Posted By: Timo325 How far are you looking to extend your OCI? I'm thinking once a year, fewer than 20,000 km. Quote: How long is does it take you to drive that 16KM? Half an hour-ish... On the way back from work I pick the kids up from daycare, so the return trip is closer to 30...

Quote: If your OCIs are 8-10k kms, there is no need for premium filters. I'd like to extend my OCI to 20k km (20 megametres?). I'm planning on switching to an "extended performance" oil.

Hi everyone, First time posting, although I've been lurking for quite a while. I'm looking for opinions on cartridge type filters. I have a 2008 Mazda3 (2.3L) with about 150k km. It takes the cartridge oil filter, not the spin-on. I currently use OEM Mazda filters. I put in 5w20 in the summer...