which oil ?, 5-30 or 10-30 Options

[NaderG]

which one is better for a 5sfe with 99,XXX , no leaks and in temps that goes over 100 F ( cali ) ??

[NaderG]

OK , problem : when i was buying my oil , i ran into one of those motor flush things , i added it to the old oil , ran the car at ilde for 5 mins ( according to directions ) and drained , left to drain for a while, then put the new oil in ..... level is ok , everything seems good .... the problem is that when i start the car after being parked for hours ( engine cold) , it sounds like oil isnt reaching everywhere its supposed to , this kind of loud sound and the oil lamp stays on for about 30 secs , then the light goes off , the sounds goes away and engine runs good ..... what is this ???? i checked my oil level , its ok but it seems to me like the oil still smells like that flush fluid , and a couple of times when i pull the dipstick out , i can see what seems to be like sludge on the absolute edge of the dipstick .... i read a couple of articles online saying that the 5sfe also develops sludge problems if not pampered .... something that the previous owner didnt do ..... so what is it that can i do ???? how can i solve this problem.... i been using mobile 1 supersync extended performance oil ( like 7 bucks a quart ) .... so what can i do ???? i want to drain the current oil and fill it with another , but as you can see , it will be expensive and i am low on cash ..... any suggestions ???? plz !!!