Mixing up 5W-40 with 0W-40 Mobil1

[CivicFan]

Yesterday I bought oil for the BMW. The reccomended oil is Mobil1 0W-40. Unfortunately, there is 1 quart of 5W-40 that I must have picked up in error. It is recommended for diesel engines but is graded SL.

The question is, is it OK to mix 1 quart of 5W-40 with 6 quarts of 0W-40 for BMW engines or should I go through the hassle of exchanging it at AutoZone (an unpleasant experience at any given time)?

 

[brian12]

I don't know why it would hurt anything. I just ran a mix of 0w-40 and 0w-20 Mobil 1. My engine is still running fine.

 

[Quattro Pete]

Shouldn't be an issue. But if you do go to AZ, return all the M1 and get GC instead.

 

[09rexwagon]

Originally Posted By: Quattro Pete
Shouldn't be an issue. But if you do go to AZ, return all the M1 and get GC instead.

Haha, that's exactly what I was going to say, but I refrained .

EDIT: My brother in law's e36 M3 runs so much more quiet on GC than M1 0w40.

 

[CivicFan]

They had a deal - buy 5 quarts of Mobil1 and a filter for $30. Was gonna get the German Castrol but my cheapskate side won.

 

[bepperb]

I wouldn't go through the hassle of returning it.

 

[Quattro Pete]

Originally Posted By: CivicFan
They had a deal - buy 5 quarts of Mobil1 and a filter for $30. Was gonna get the German Castrol but my cheapskate side won.

Well, the AZ deal on GC is even better: 5 quarts and a K&N filter for $28.

 

[CivicFan]

Originally Posted By: Quattro Pete
Originally Posted By: CivicFan
They had a deal - buy 5 quarts of Mobil1 and a filter for $30. Was gonna get the German Castrol but my cheapskate side won.

Well, the AZ deal on GC is even better: 5 quarts and a K&N filter for $28.


I didn't see it when I was there. Will check out this weekend.