Engine oil Castrol or OEM Mazda

I use Castrol EDGE 5W-30 LL Fully Synthetic Engine Oil on my B48 pre LCI G21 no issues at all and complies with BMW specifications

I have a 2010 Jetta TDI cup edition with the CJAA engine and the factory spec listed in the manual is 5W-40… On top of that the oil cap alone has Castrol on it\nSo Castrol 5W-40…. End of story…. I apologize if I sound condescending as I do not mean to and also recognize you may have purchased your vehicle second hand and it may have not come with a manual… But if the top of your 710 aka oil cap says Castrol on it and you truly have a CJAA engine then I guarantee you that Castrol 5W-40 is the proper oil regardless of location or climate Ps…. Anyone who claims to use or recommend anything else has also probably had massive engine problems or engine repairs an question why they had those issues Follow factory spec and maintenance recommendations…. I’m pushing 280k on my CJAA engine without a single issue

I personally am changing my own oil with full synthetic on my 23 2.5T every 6000 km or so. No need other than peace of mind for me. Doing it myself only takes 30 minutes and $35 in oil, filter and crush washer.

For [Naturally-Aspirated Skyactiv engines](https://en.wikipedia.org/wiki/SkyActiv), it is highly recommended that you use Mazda's own(Idemitsu) high molly GF-5 0w-20. [Arguably it is one of the best oil for skyactiv engines](http://www.cleanmpg.com/community/index.php?threads/45295/#post-357910).

Done 2 oil changes so far and car has not used a drop of oil and I drive it pretty hard.

I’ve used Castrol and Castrol High Mileage on my Mk6. At just over 143K miles, I’ve had no engine issues at all.

Been running Castrol in my VWs for 20 years. Never had any issues.

Castrol euro has been good to me for the last 120k miles.

Daca e motor de la VW atunci recomandarile mele ar fi Liquimoly Longlife III, Motul 8100 X-Clean+, Mobil 1 ESP.

Reprezentantele folosesc in general Castrol Edge LL. Dar eu nu prea sunt impacat cu brand-ul asta.

cu cat l am folosit mai mult am ajuns la concluzia ca castrol e un gunoi, cel putin pt motorul meu si am trecut la uleiul original ca sa nu le mai incerc pe toate