Hello everyone, this is my first post. I was at this small ma and pa autoparts store a month back when i saw fram synthetc motor oil on sale for $3.99 a qt. So i bought 5 qts. Unfortunatly i didnt have enough to buy anything else. I just put a brand new 4.7 crate motor in my dodge with a 7 year 100k warranty. My manual gives me 2 schedules 3k or 3mo. Or 7.5 k or 6 mo. I drive 32 mi round trip to work everyday 75% highway & 25% city. I never used synthetic oil before and i was wondering if any of you guys had any suggestions for intervals and filters. I plan on using synthetic from here on out because the motor is past the break in period. Thanx for your help