mobil 1 5w-50 for x5 3.0d

[eddieboy2]

ey guys, is mobil 1 5w-50 okay for my x5 3.0 diesel?

btw i'm in the philippines (tropical country)

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[X5Flyboy]

My dealer said BMW recommends the Castrol oils as being more identical to the BMW oils - I've always been a Mobil 1 fan in my other cars and have had no engine troubles while using it.

[eddieboy2]

Originally Posted by burkleymh

My dealer said BMW recommends the Castrol oils as being more identical to the BMW oils - I've always been a Mobil 1 fan in my other cars and have had no engine troubles while using it.

butr what about the grade that i'm going to use? 5w-50? on the x5 3.0 diesel? is it okay?

[eddieboy2]

need help asap!!! i'm abt to buy my oil later and change it tom... waaah!!!

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[Donegal TDI]

Oil for a diesel has extra detergents in it.
Check Mobil's web site for suitability.

[withidl]

Originally Posted by eddieboy2

ey guys, is mobil 1 5w-50 okay for my x5 3.0 diesel?

btw i'm in the philippines (tropical country)

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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

[eddieboy2]

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

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

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

[powers1]

Originally Posted by eddieboy2

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

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

You are right!Bmw do use same oil in Diesel and petrol variants......Just check your manual.Make sure you get the longlife oil as recommended in the Manual!With respect to brands,Mobil or Castrol,this is a matter of contract agreement between Bmw and the oil supplier!I have had Bmws M3 since 1988 up to now,and in the 80's and 90's Bmw recommended ONLY Mobil 1(5w 50 for my M3),since then it seems that Castrol gave BMW a better deal and thus they are using Castol Oils!I still prefer Mobil1 like a lot of people who have had Bmws for decades,I dont like Castrol because in my experience the oil has an unpleasant odour and it sends out more condensation through the oil breather pipe.......
My opinion!Stick to what it says on the Owners Manual on alternative oil grades and use Mobil1 that has the same specs.Btw the recommende viscosity is 5W 40...................
FYI Bmw use same oil for petrol and Diesel because the Diesels are Turbo and need an oil that can stand high temperatures,be able to lubricate the turbo parts that rotate at over 100,000 rpm,and will not deteriorate and block turbo oil lines!This oil needs to be synthetic based and has nothing to do with oils that are used in NORMAL diesel engines.

[withidl]

Originally Posted by eddieboy2

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

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

All vehicle manufacturers compromise on engine oil recommendations

Low viscosity is good for fuel mileage ratings, thus BMW’s primary 5W-30 recommendation allows BMW to advertise higher mileage figures, but is deleterious to engine wear which is greatly reduced when using the higher viscosity 15W-50 oil. The knowledgeable Consumer has to make the choice of mileage vs. engine longevity.

Likewise, the availability of specifically formulated diesel engine oils to the motoring public through service stations or “Quick Lubes” is problematic because the motoring public is not aware of them, therefore don’t ask for them, therefore the product is not inventoried.

Yes, gasoline engine oils have “some” of the attributes necessary for use in diesel engines and because they are more readily available (thus recommeded by BMW) can be used, but as with the viscosity statement above the knowledgeable Consumer has to make the choice.

Diesel engines are relatively low revving extremely high compression high torque engines which burn relatively (compared to gasoline) high sulfur content diesel fuels. In the USA lower cost diesel #2 (also known as “railroad diesel”), which has a high paraffin/sulfur content which “gels” at low temperatures, is marketed to the motoring public during the summer months. Higher cost diesel #1 (also known as kerosene which when highly filtered becomes aviation jet fuel) has much more of the paraffin/sulfur refined out and is marketed during winter months (doesn’t “gel” at low temperatures). It is the relatively high sulfur content of diesel fuel (European diesel is cleaner, i.e. has less sulfur than that in the USA) as compared to gasoline which presents the greater problem for diesel engine oils.

The higher sulfur content of diesel fuel vs. gasoline results in much more sulfur being “blown by” the piston rings as hydrogen sulfide (H2S) which when exposed to water in the crankcase becomes sulfuric acid (H2SO4). Diesel engine oils have to cope with this relatively greater sulfuric acid content and are formulated to do so by having a greatly increased “Total Base Number” (TBN), which is equivalent, to having more “Tums” available for the crankcase acid indigestion.

That being said, I personally would only use an engine oil formulated specifically for diesel engines.

[powers1]

Originally Posted by withidl

All vehicle manufacturers compromise on engine oil recommendations

Low viscosity is good for fuel mileage ratings, thus BMW’s primary 5W-30 recommendation allows BMW to advertise higher mileage figures, but is deleterious to engine wear which is greatly reduced when using the higher viscosity 15W-50 oil. The knowledgeable Consumer has to make the choice of mileage vs. engine longevity.

Likewise, the availability of specifically formulated diesel engine oils to the motoring public through service stations or “Quick Lubes” is problematic because the motoring public is not aware of them, therefore don’t ask for them, therefore the product is not inventoried.

Yes, gasoline engine oils have “some” of the attributes necessary for use in diesel engines and because they are more readily available (thus recommeded by BMW) can be used, but as with the viscosity statement above the knowledgeable Consumer has to make the choice.

Diesel engines are relatively low revving extremely high compression high torque engines which burn relatively (compared to gasoline) high sulfur content diesel fuels. In the USA lower cost diesel #2 (also known as “railroad diesel”), which has a high paraffin/sulfur content which “gels” at low temperatures, is marketed to the motoring public during the summer months. Higher cost diesel #1 (also known as kerosene which when highly filtered becomes aviation jet fuel) has much more of the paraffin/sulfur refined out and is marketed during winter months (doesn’t “gel” at low temperatures). It is the relatively high sulfur content of diesel fuel (European diesel is cleaner, i.e. has less sulfur than that in the USA) as compared to gasoline which presents the greater problem for diesel engine oils.

The higher sulfur content of diesel fuel vs. gasoline results in much more sulfur being “blown by” the piston rings as hydrogen sulfide (H2S) which when exposed to water in the crankcase becomes sulfuric acid (H2SO4). Diesel engine oils have to cope with this relatively greater sulfuric acid content and are formulated to do so by having a greatly increased “Total Base Number” (TBN), which is equivalent, to having more “Tums” available for the crankcase acid indigestion.

That being said, I personally would only use an engine oil formulated specifically for diesel engines.

Great information.I agree with some of your points!But who is using 15W-50 oil?Eddie is asking if he can use 5W-50!!!!!!!
Btw,you are forgetting the fact that not only are we referring to a DIESEL engine,we are refering to one with a Turbo!Since the oil also has to lubricate the this ,it needs to be able to deal with higher temperatures than in an normally aspirated engine.