After many nights of reading on this site i have been trying to decide if mobil-1 5w30 or m1-5w20 is the better choice for my 2002 ford focus with a 2.0 spi motor at 50,000 miles! After studying the viscosity chart(I forgot who posted it) It seems like the 5w30 would be the better choice. The protect about the same in freezing temps but the 30wt seems better up in the 70 to 90deg. rage. What do you all think. PLEASE HELP,THIS IS REALLY DRIVING ME NUTS
Thanks everyone

Thanks everyone