Mixing Mobil1 0w30 & Mobil1 0w40

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2,480
It's safe, but the question is why would you want to? They're both a 0W and as far as the 40...why not want the added protection?
 
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705
Location
Bismarck, ND
mobile2, very interesting. I have never thought of doing that. Do you just do it in the winter? Do you noctice any difference in start up or noise when it's cold out? Finally why? I just may consider this.. Thanks!
 
Messages
66
Location
Cleveland, Ohio
Since I have cases of both out in the garage, I plan on mixing 3-1/2 quarts of Mobil 1 0W-40 with 2 quarts of Mobil 15W-50 to make a "witches brew" of approximately 5W-45 for use in my modified Taurus SHO V6 during the warm Summer weather. The car is only driven from April though October and sees occasional track time on regional road courses. The engine is no where near stock, with a higher compression race prepared stroker short block and full prepared heads.
 
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34,389
Location
NJ
Thats a good idea. One good think about the Mobil 1 line is that they all share the same chemistry across the board. Mixing is safe and can be effective if need be.
 
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