Recent content by nxnick

Not wanting to start another thread, but how would SN 5w-30 Formula 1 Full Synthetic compare to HDEO like Rotella T6 5w-40? I'm looking for a oil to run in a '92 Miata with noisy lifters (usually caused by dirty oil) for short (3000-5000mi) OCIs. Car does see a mix of 60% city 40% highway...