Car is a 93 Ford Escort GT with the 1.8 DOHC mazda BP engine found in the Protege of the same years. MPG is the name of the game for this car. I have been running Mobil 1 Advanced Fuel Economy 0w-20 for a while now but my local Walmart stopped carying it. I have also been running a larger Fram Extra Guard Oil Filter for the 2.5 liter Probe GT. It burns a quart of oil every 10k miles so I don't plan on changing too much. I was thinking of going with Mag Oil since it is just under $30 at Amazon for 6 quarts of 0w-20 where it was over $41 for 6 quarts of M1 at Walmart + Tax. I'd like to know if you think Mag1 could handle the 10-12k OCI. I like that it's viscosity is a little thinner than the M1 at 40 and 100C so more gas mileage. However, I am worried about going a little thinner on 130 mile per day highway round trips. Reliability is also in mind besides gas mileage...the Escort has proven very reliable and don't want to change that! Any thoughts on the oil filter? Is there anything cheaper than can do the same 10k OCI? Thank you!