Im changing my lifters this weekend so ill be changing the oil to get rid of any coolant in the oil. I broke in the motor with Dino (regular oil) for about 1500 miles and I switched to Mobil 1 synthetic. For some reason the oil always gets dark very early, im thinking blowby? If i run synthetic I dont want to change it for like 5,000 miles but since it gets dark so soon I dont want to be running the motor with such dark oil for so long. So should I switch to Dino oil so I can change it at 3,000 miles or keep using Mobil 1 and change it at say 5,000 miles? Ive only been running Mobil 1 for 800 miles tops so would it be safe to switch to regular oil? The motor has all new seals, gaskets etc. and any reason why my oil is getting dark so early? The motor was hot tanked, steam cleaned etc. Btw should I soak the new lifters in oil too?