I went to autozone this morning and got the last 12 quarts they had of the max life full synthetic for 2.00 each( what a deal ehhh!)its the SL version 10w30, and it says recommended for engines specifying API SL/SJ,ACEA A3/B3/B4,BMWLL01/98,VW502.00/505.00,MB229.3/229.1 Now is this oil a good choice for my 1998 f150 4.6 engine?(ford says 5w20) Im using right know 5w30 penn truck and SUV(semiblend)will the maxlife do good in my truck been a 10w30? i hear that synthetics run thinner than regular dino oils is that right?and if i do use it in the f150 how long?(miles)by the way my truck has 88k. tks