Originally Posted by withidl

Diesel engine oil requirements are considerably different than those of gasoline engines. DO NOT PUT A GASOLINE ENGINE OIL IN A DIESEL ENGINE!!

Mobil's diesel engine oils are branded as "Mobil Delvac". They're primary diesel engine oil is "Mobil Delvac 1 5W-40" which they also "re-brand" as "Mobil® 1 Truck & SUV" (I've looked at the specs on both and they are identical).

Your BMW manual will provide an oil recommendation (Castrol). As long as the Mobil oil has the same API (American Petroleum Institute) classification as the manual states you'll be OK. The API classification for both of the above Mobil oils is: API CI-4 PLUS/CI-4/CH-4/CG-4/CF-4/CF/SL/SJ

Originally Posted by bozo5521

I thought you didnt have to worry about this for another 30,000 km's?!

Originally Posted by powers1

It is best to do it at about 20,000 kms to coincide with the reset request of your oil service light.You and Eddieboy are the only ones on the same frequency as me!I mean,is it only us who read the owners manual??Why dont the others follow what is on the manual???It has even been said that "you cannot use same oil in Diesel and petrol engines".I BELIEVE THAT THIS SITE IS WHERE YOU COME FOR INFORMATION,NOT TO BE MISINFORMED!!!!!!

Originally Posted by withidl

Diesel engine oil requirements are considerably different than those of gasoline engines. DO NOT PUT A GASOLINE ENGINE OIL IN A DIESEL ENGINE!!

Mobil's diesel engine oils are branded as "Mobil Delvac". They're primary diesel engine oil is "Mobil Delvac 1 5W-40" which they also "re-brand" as "Mobil® 1 Truck & SUV" (I've looked at the specs on both and they are identical).

Your BMW manual will provide an oil recommendation (Castrol). As long as the Mobil oil has the same API (American Petroleum Institute) classification as the manual states you'll be OK. The API classification for both of the above Mobil oils is: API CI-4 PLUS/CI-4/CH-4/CG-4/CF-4/CF/SL/SJ

Originally Posted by eddieboy2

ok, ok, you're messing this thread...

as i've read bmw uses the same oil in their petrol and diesel engines.. right??? :dunno:

try reading the diesel's owners manual and try reading/reviewing forums and ask about bmw's diesel engines....

Originally Posted by powers1

Hi Eddyboy.We are really confusing you!Sorry!5W50 is the grade I use on my M3(Bmw recommended)!The grade recommended for the x5s is 5W40 which is a thinner/high temperature oil.I would say it should be fine to use 5w 50 but make sure it is synthetic based(most are anyway!).If it isnt LONGLIFE then you have to change it at about 10,000 kms.If you have doubts you can PM me,ok!

Originally Posted by eddieboy2

:)


thanks a lot powers1!!! ur the only one here who seems to understand what i'm asking and talking about... by the way i'm going to use mobil 1 5w-50 fully synthetic w/ super syn... it says at the back ACEA: A3/B3/B4.... would that be okay? that's the only specs that i can see at the back of the 5w-50.... :)

-->ed