Castro Synth. is all i ever used in my BMW 60,000miles runs perfect change every 7,000 miles
(5w-40)
After some research I heard people use 5w40 to quiet the motor down and lubricate the lifters better for high mileage engines. picked up some castrol edge 5w-40 and it runs buttery smooth, noticeably quieter and another big thing is oil consumption drops A LOT due to the oil being thicker and harder to burn or leak. I used to need maybe a quart a month now Ik down to half a quart a month.
I use this Castrol Edge 5w40 for 5 years already in my e46’s m54b30. No issues. Trying to stick to 10k km intervals.
In my e39 M54B30 473k km I am dumping Castrol Magnatec 5w-40.
Nothing to complain.
I use castrol 5w-40 Euro on my 2006 Revup. Good oil pressure on hot SoCal days and burns less oil.
I have an MX-5 with that engine, Mazda uses Castrol Edge 0w20 but you can use a heavier oil and sime say it reduces wear. The purpose of the 20 weight is fuel economy.
I live in Turkey vw service uses Castrol EDGE 5W-30 LL
So, the cause for VANOS to work as shit was an oil. I put Motul and engine drunk it like it was a water. After oil change to Castrol magnatec, engine works like a charm.
Wife has a 2015 jetta with the 1.8t and burns 1L every 500 -700 miles. My 2016 a3 burns relatively nothing but maybe half a liter every oil change interval and has same engine.
Stay away from the stuff that the dealer puts in, the Euro Car formula(5w-30 i believe) that Castrol makes is a Blend, meaning not fully synthetic and it shears and burns really quick.
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