Hello all, im a new member here although I have been reading just about every post for about 6 months , great stuff. Anyway, im looking for some free advice, I recently had a complete rebuild on my 5.0 T-Bird and had been using Formula Shell 10w-30. After winter ended, I changed to Valvoline Durablend 10w-30. What was noticeable almost immediately was that the lifters were much quieter now. Question is , is this a indication of a better oil ? or any suggestion to another oil would be welcome , im looking for the best oil for my car. I read that Valvoline oils get a bad rap because of a 'weak' additive package but in a article i read the author stated that less additives are better. Again, im not a expert just want to get the best i can for my car .Any opinions are welcome. Thanks.