Engine oil Castrol or OEM BMW
Used 5w40 castrol for most its life, but vw504 standard is good too. Using it now and the old man says it runs good.
bmw oem 5w30. n ai cum sa dai gres.
My Mazda3 which I service myself now, Castrol edge 5w-30 and feels happier. Same engine too.
I always used blue "german" coolant in my e90 bmw oddly it also recommended Castrol oil. Specifically called for it in oil cap
i drive 85% freeway so i change the oil and oil filter every 7500 miles using Castrol Edge 0W-20 synthetic oil since 2017 no vehicle issue.
I put Castrol euro 5w-50 made for BMW and it's 6-7 liters and change it every 5000km I have a 2003 330ci and it still runs like new
5w40 VW 502 spec. Audi recommends Castrol so that's what I use.
Personally i never run ”GM” oil in my 95s anymore. I usually run Castrol edge 0-40
For example my previous BMW engine was very noisy with mobile 1, and quiet with castrol
Today I changed my engine oil to castrol power1 Cruise 15w-50 with TVS engine oil additive. Post that my engine starts to vibrate at bit early rpm & getting hot more quickly & frequently.
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