There are other easons to run synthetics besides extreme cold and extended oil change intervals...... Running a quality synthetic virtually eliminates turbo coking, plus for extreme HP guys it will add a slight amount of HP on the dyno.

Doug

 

YEA MOBIL SENT ME ARTICLES TODAY SHOWING THAT THEIR TRUCK AND SUV FORMULA IS NOT TOO LIGHT OF AN OIL. IT EXCEEDS 15W40 IN HYDRODYNAMIC BOUNDRY AREA LUBRICATION AND PROVIDES EXCELLENT START UP. I WILL RUN IT ALL YEAR LONG. IF ANYONE WANTS THE ARTICLE THEN GIVE ME YOUR EMAIL ADDRESS.