Oil filter Bosch or OEM Mazda

Depends on year and where you are located. I would never buy a cheap one, since a Bosch is 10 euros, and I'm not willing to take any chances for 5 euros or less, which is the price difference with a ridex or something like that.

I’ve just been purchasing Bosch filters from Halfords or eurocarparts. Oil I just use fully synthetic oil 5w30. I’ve had the car since 60k and it’s about to hit 100k and it’s still smooth as hell.

I would stick to Bosch, Mann & Mahle for filters.

Got a Bosch on Amazon, wasn't changed on my 2 year service. Thank you for sharing, so easy to change.

YES! My 2012 Skyactiv is at 233K miles, and has always had the Mazda Moly 0W-20 (with the exception where I was able to get the Idemitsu version, which is the same stuff, but without Mazda's markup. Sucks that it isn't available anymore. ) and I'm not about to chance running a different oil.

Always run a Mazda filter too. The quality seems better than most.

I use OEM Mazda filter. Synthetic oil, Kirkland brand or Castrol since i think thats who makes the Mazda oil.

That's the filter I've been using on my 2015 mazda 3, I've been getting them from Rock auto. So far no issues that I can see, took one filter apart after use and it seemed good.

Yes, absolutely can use Bosch and they were fantastic.

I have a 2001 Passat 1.8T, on which the oil and filter have been changed every 6 months or 3K mi, whichever came first. The dealer performed the first 4 oil changes, to the 2-year point, then I took over, always with a Bosch or Napa Gold (Wix) filter. Having received the engine sludge notice, I switched from name-brand dinosaur oil to Mobil 1 at my most recent oil change (last month, 23K miles). Although I receive no adverse temperature or indications at the instrument panel, the valve cover SEEMS perhaps to be running a bit hotter than before. What really concerns me is that, when the engine is warmed up, if I stop and idle it for 30 seconds or so, the engine starts making what to my semi-practiced (but new to VWs!) ear sounds perhaps like valve, lash adjuster, or camshaft bearing clatter. The sound emanates from the rear/cylinder 3-4 area, away from belt-driven accessories, etc. Does this sound like an early symptom of sludge, perhaps associated with insufficient oil pressure at idle? Given my history of frequent oil changes and otherwise by-the-book or better maintenance, I would not have expected to be a sludge victim at 23K miles. I suppose I could have just installed a defective brand-new Bosch filter, or I suppose the synthetic oil could have loosened some sludge from my dinosaur days, but these seem like real stretches for an explanation. Any suggestions regarding diagnostics?

Happened to me last winter with a Bosch oil filter -- not even an el cheapo aftermarket filter, either. It looked someone had wrung it out like a dishrag.