right, so i have a 1991 honda civic DX sedan with the 1.5 L 1493cc engine which i use to haul around pizzas with. basically the regime when working consists of: - start up engine - take off immediately and drive briskly to customer's house - idle in driveway for ~2-3 mins - take off and either come back to store and shut off engine, or go to another house. repeat this about 15 times a night, 5 times a week or so. right now i'm using regular oil with a Wix 51344 oil filter.. i think i'm going to stick with the filter but need to know what you guys think would be a good oil choice. i'm thinking along the lines of mobil 1 and the manual calls for a 5w30 grade. and yes the ATF fluid gets changed every 10,000 km car has 147,000 km on it right now. fire away.