jordan88

hi, i have a 98 civic ex coupe, with 150,000km on it, and i am thinking to change the oil to synthetic. But i have heard that changing to synthetic at high mileage would cause leaks, is this true and why would it? i thought synthetic is better oil?

and should i use 5w30 or 10w30?

thx

jordan88

Also is it neccesary to do a flush b4 pouring synthetic in the motor?

AP1dude

98 w/ 150k..........WHOAH.....:awais:

Level_7

He said 150,000 kilometers, not miles - about 90,000 miles; not _overly_ high.

Why are you planning on switching to synthetic?

Cashis EG8

My usual philosiphy (sp?) is, if it ain't broke, don't fix it.

So if conventional motor oils have worked up to now, I'd stick with them

jordan88

cause honda is charging $30 canadian for an regular oil change, and if i bring synthetic for them to change, it would cost about $40 including filter and oil.

FromTheBottom

do it yourself for $15 canadian!

AP1dude

O..:thinking:....i wasn't paying attention...:usa:

carstereo2000

Most mechanics would say that changing to synthetic at high mileage would cause leaks and other problems. You have to start using synthetic oil when the engine is new. Also you can't go from Synthetic to Regular :nono:

DSC

Stick with the regular. And do it yourself.