hello i am new here, ive been snooping around here for awhile though . my question is what would be a good oil for both of these cars. i dont want a bunch of different types in the garage just one type for both would be great. my first car is a 2008 pontiac vibe just bought it about 6 months ago and just used the last free oil change. and a 98 sl2 my beater car. both run good though the saturn has over 200,000miles and the vibe has about 70,000 so what would be a good oil for both that isnt extremely expensive. thanks all and glad to be here.