Originally Posted by wiscdave
I dumped my virgin oil at 500 miles
that was pretty stupid, all manufacturers use a special break in oil designed to help the rings seat. when you build any motor new or rebuild you have to let the rings seat so they won't rotate around the piston, they will wear against the walls of the cyl and seal up.
all this talk about metal shavings ha ha you guys are so funny! some have even mentioned metal flakes! are you kidding me? have you ever built an engine?
if you had flakes of metal in the motor believe me you would have some pretty major issues.
first of all keep in mind that yes there is wear, but we are talking about metallic POWDER particles so small you would need a microscope to see.
with that in mind realize that NONE of the parts in the engine have direct metal to metal contact, they all carry a film of oil between the bearing surfaces and the rotating assemblies. and the rings and cyl walls. there are some irregualarities in the rings and cyl walls that do touch but thats what break in does, thoes parts wear together. also camshafts and lifters have to wear together their surfaces to have minimal contact and need to wear together.
now getting back to the metal particles. yes there are some but they are all smaller than the space that is between bearings and other surfaces and they are held in suspention of the oil. its not like they get ground up in the motor and most of which ends up in the bottom of the oil pan. from there they go through the FILTER which is exactly what it was designed for. to remove particles large enough to cause dammage to the engine.
do you really think your doing your engine any good or making it last any longer by prematurely changin your oil? do you really think the manufacturer who designed the engine, who has a reputation of quality and building products that last 200K+ miles don't know what they are doing? do you think if it was at all dammaging to your motor to leave your original oil in for 5k miles they would print that in the owners manuel?
come on guys! let's use our heads a little shall we? follow the manufacturers instructions, believe me they know a lot more than you do about their products. changing your oil early is just a waste of money and there are a lot of commercials on TV that have claims about their oil they can't prove! all because they know there are people like you who believe the hype and will spend the money to buy their products.
i buy castrol 5w30, always have, is it any better than quakerstate? penzoil? who knows? who cares.. there is no research i know of that proves using synthetic oil will make your motor go a million miles before a rebuild verses using dino oil. it's not like you see cars stranded along the side of the road that konked out because they used regular oil and changed at the manufacturers reccommended intervals.
not only that, youll probly sell your truck LONG before it reaches it's life expectancy or it will be involved in an accident and totalled well before the engine reaches it's usefull life.
now if you turbo or SC your engine it may not be a bad idea to upgrade the oil, it certainly can't hurt. but for the rest of you if you want to throw your money away worried you have metal flakes in your engine i guess to each his own, a fool and his money i guess.
i have a honda VTX 1800 the oil change interval on that bike is 3K for the first change and normally 6k after that. the reason is because it has wet type clutch and there ARE clutch particles in the oil. you have to change it because if you don't it can fill up and clog the oil filter. but only because it is a new clutch.
cars and trucks don't have clutch material in the oil abd they dont have metal shavings or flakes!