Evening folks,
I've been trying to understand this crazy world of oils here. I've been a fan of amsoil for quite some time - UOA on my previous G37 always turned out great, at least...in the the eyes of an amateur. Despite, would love to utilize amsoil again on my '18 BMW 440i, and upon doing some research, it seems that Castrol's OW40 is a popular choice. I understand HTHS and that essentially...the higher the better. I've also come to understand that O weight oils tend to do better in either spectrums (cold vs hot).
These two are the info sheets that I found. It seems to be that amsoil performs better? But because I cannot quantify this data, I have honestly no idea if amsoil's seemingly better performance is large enough to warrant using amsoil vs castrol. My commute as of next month, will only be 10 minutes in CA weather (Loma Linda). I drive more aggressively than most (currently in Seattle); I do not care about gas mileage, rather would be happier knowing that I am running an oil that provides more protection, but am concerned that the car will take a hit while driving only a ten minute commute, where my motor will likely not reach normal operating temperatures. Any thoughts would be GREATLY appreciated! Thanks guys!
I've been trying to understand this crazy world of oils here. I've been a fan of amsoil for quite some time - UOA on my previous G37 always turned out great, at least...in the the eyes of an amateur. Despite, would love to utilize amsoil again on my '18 BMW 440i, and upon doing some research, it seems that Castrol's OW40 is a popular choice. I understand HTHS and that essentially...the higher the better. I've also come to understand that O weight oils tend to do better in either spectrums (cold vs hot).
These two are the info sheets that I found. It seems to be that amsoil performs better? But because I cannot quantify this data, I have honestly no idea if amsoil's seemingly better performance is large enough to warrant using amsoil vs castrol. My commute as of next month, will only be 10 minutes in CA weather (Loma Linda). I drive more aggressively than most (currently in Seattle); I do not care about gas mileage, rather would be happier knowing that I am running an oil that provides more protection, but am concerned that the car will take a hit while driving only a ten minute commute, where my motor will likely not reach normal operating temperatures. Any thoughts would be GREATLY appreciated! Thanks guys!
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