I have read a lot of posts here on this site....my opinion on oil is that if you change your oil every 3,000 miles or 3 months whichever comes FIRST it absolutely does NOT matter which oil you use BRAND wise! Dino or SYN. Now, if you change less often SYN maybe better than DINO. I use whatever I can get on sale in my two 3.8 GM engines. 10-30 but I do use a thinner 5-30 in the winter. I will even mix brands of the same viscosity I DONT THINK IT MATTERS if you change it often and why not? Peace of mind and if you can do it 4 times a year for $8 to $12 who cares? Now, the oil filter analysis here impressed me greatly. I have used all kinds of filters neever thinking of oil FLOW. Supertech at Wal-mart $2.07 at WAL MART plus tax has great flow and this PuroPP sounds great! I will never buy FRAM again! Change it often and always change the filter! Keep enough in and relax!