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ok that makes sesnse, just wish that m1 would make a 10w40 with out the high mileage

im new here guys! well ive been running Mobil 1 10w30 in my 95 trans am ,and want to switch to Mobil 1 10w40 in the summer, the thing is the only 10w 40 in Mobil 1 is highmileage, and my engine is rebuilt with about 10k miles (no oil leaks)so will the highmileage stuff be ok? or should i just...