Synthetic Oil Improvement in /6

Im hooked on Mobil 1, there are other good brands of synthetic but the main reason I run Mobil 1 is because its easy to find if far away and need a quart etc. I get 10-40 at walmart and was on sale a week or so ago for $22 for the 5quart jug, 10-40 is sometimes hard to find at walmart, mainly because I see people stocking up on oil there in order to RE-SALE it and make some money.