If you want oil that has zinc, close to the oe oil weight, and is really good I'd go with ams oil, it is expensive but after 3k miles mine is still really clean
Absolutely always use mazda filter and the owners manual says use Castrol which the three local Mazda dealers use this I also go with it. Over 60k miles with oil changes anywhere between 3k-6k and still runs great.
I have been using AMSoil for years and did the once a year/25k miles oil change for years and and my engines have had zero issues.
I use Castrol GTX 20W-50, same as what the manual calls for. I know the oils changed since then but the previous owner didn't care for the car properly so I feel like the detergents are necessary.
Everything I've found for my 2008 Rabbit 2.5L engine specifies Euro 5W/40. Although you can find it in several brands, the best price I've found is the Castrol Edge Euro 5W/40 at Walmart for the 5-quart jug.
FWIW: I live in Maryland and use Castrol Syntec 5w-40 in my 2012 JSW 2.5. I usually buy the filter and plug/washer from the dealer because they have the best price and I don't have to wait or pay for shipping.
If you only daily and don't run hot, hard, or do lots of WOTs; then just use Honda or other quality oil that you are comfortable with. If you push it harder and want to spend money, use something better like Amsoil Signature (my choice), Royal Purple, or Motul.
I run Amsoil signature blend and filters. Expensive but I believe in it.
I use castrol in my 2014 cx5.
I only use amsoil in my gti...would never use n e thing else in my car
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