Quote Originally Posted by trini_gsr View Post
for my first built b18c (pistons/rods) i changed the oil at 100 miles, 500, 1000, then 1500 with regular 5w-30 oil. then you can change again at 3k miles with synthetic and keep using it from then on. i wouldn't go 6k miles between oil changes on a boosted motor...stick with 3-4k between changes to be safe.
and i think 5w-20 is too light...if you rebuilt the motor with oem parts i'd say stick to what honda recommends, 5w-30 or 10w-30. for built motors some ppl like to go thicker. i've tried a bunch of weights and personally like 5w-40 (i use it in my 1.8t audi and in the teg during the winter) and 5w-50 the best.
why do you say this? do you get your oil tested? do you have any information to back this up or just going on what other people say and talk about.