dumb queistion, don't wanna screw anything up, if not to late. iv'e read some post on oil and filters. what would be a good weight and brand for hawaii weather and i read the post about filters, somthing about a flap or something i just took off my filter and it was a napa gold 1258, is this the right one. i'm trying to fix this headgasket leak ended up contamanating my oil so i'm gonna change it, before and after the cam and engine break in what type of filter and oil. thanks in advance. mikey