I have some leftover M1 0w30 & 0w40, both SuperSyn. Any harm in mixing them (3 qts. each) and running it for 5K miles in my '02 allroad? Or are the oils too different? I plan to switch to GC after that.
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!
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.