Originally Posted by
Valdelisbmw
i have said few times before but anyway , i have used to use castrol long time ago ,and once got chance to get Liqui Moly ,cos wasnt easy to get it before ,and found huge difference in few examples . with castrol vanos unit was very noisy , when engine heats up to working temeperatures ,and goes mad on track .with castrol oil temeprature gets very high . With Liqui Moly , on daily driving vanos noise nearly dissapeared and got just slight rattle when used on track . So used Liqui Moly for a while .
Got another engine in my M3 ,very low mileage , inside was clean as from factory !somehow had no chance to get Liqui moly so got Catrol , used for few K miles , maybe 2-3K . Vanos had some slight rattle .needed to do some vanos timing adjust and when opened rocker cover, found engine not clean as was before , aluminium strated to get some yellow- light brown collour so changed it to Mobil 1 10w60, Engine is still as new inside , after lot trackdays and daily driving ,all vanos noises dissapeared completely and oil temperatures keeps much lower as with Castrol , have heard lot people saying Catrol is not good for high temeperatures , even it was made to work with high teperatures . Vanos noise means oil loose its performance on higher temeperatures , parts wear much quicker and it gets to high temperatures very quick . and very lot people found that after Castrol engine gets very dirty inside , immena it leaves the dirt- carbon on engne parts and its walls ,but not collects it and get rid of them with oil change .thats my story !
if somebody found some other oil is better ,im not arguing ,but i found the difference my self on these 3 different makes of oil ,and few my friends got Mobil 1 after castrol or other oil they used before and do found much better performance on track day cars