I just switched on the Integra @ 166k miles. I'm pretty sure it doesn't matter the mileage. Just get some great synthetic, drain previous conventional POS, flush out the POS oil with motor flush (or a little extra new oil) and pour in the new synthetic goodness, and finally: ENJOY!is it safe to switch with 108k, anyone have any experience.?
You answered your own question here. Nothing was flushed out. The Royal Purple garbage actually broke down all of the crap in the old oil. Crap being wax deposits. It clogged up the pickup tube and starved the engine for oil. Im just glad the customer caught it in time instead of ruining more than just the rocker pads and bearings.Ok I just read that first page on clubcivic and slammed_civic; how can you say that the bearing wear and all was from the synthetic? I don't see any valid proof for that. I've changed multiple cars over to synthetic with lots of miles on them and they all ran fine for a long time.
The only thing that is recommended when switching is to do a few low mile changes to help flush out any deposits.
It doesn't shed any light. You didn't even answer the question. You don't know what caused that buildup, you don't know what caused the bearing wear, or rocker wear, he might have run it low on oil in the past, maybe he put some oil treatment in it, you can't say that it was caused by the synthetic unless you had it inspected right before the switch and right after. The engine shouldn't even have had any build-up if it was taken care of properly. Switching to synthetic will do more good then harm, especially in a higher output motor.You answered your own question here. Nothing was flushed out. The Royal Purple garbage actually broke down all of the crap in the old oil. Crap being wax deposits. It clogged up the pickup tube and starged the engine for oil. Im just glad the customer caught it in time instead of ruining more than just the rocker pads and bearings.
Even flushing the engine out will still bring unwanted sludge into the oil pickup. In order to do an engine flush you need to bring the engine to full operating tempature by running it.
With my engines Ide much rather be safe than sorry. I will not do a switch to synthetic oil with more than 75k on an engine. Thats just my preferance and my preferance has been brought on by experience.
Hope this shed some light on questions you may have had.
The customers engine had roughly 120k on it. He ran conventional oil in it forever. Switched to Royal Purple 5w30 and this happened. Noone is whining. Im just trying to shed some light on the possibilities.Engines shouldn't have that much sludge, if any, at only 75k miles to become a problem unless they are mistreated and malnourished from the get go. Buying a poorly maintained car is more reason for whining then changing to synthetic and using it as a scapegoat