Originally Posted by txhunter69
i was changing oil for sewell ford for some time and had quite a few customers come in tht heard the same thing about rotella and didnt wanrt even a drop in their motor haha but jw does Mobil 1 deisleoil have zinc and phosphorus in it
Yes they have some but they have had to lower the amount of Zinc and phosphorus because it clogs catalytic converters. I won't recommend Brad Penn oil for a street/dragcar. Brad Penn works best in a engine with alcohol or nitros, since the oil doesn't mix easily with fuel.