[CivicSiRacer]

Originally Posted by themonsteraria

Man. So many people telling me that this brand is better, or that brand is better. And no one seems to have hard core data to back up their argument.
And I've run into another problem: A good friend of mine, who's a good mechanic, says that with the high mileage on my car, I shouldn't switch to full synthetic, because it will free up deposits that may be keeping my gaskets and seals tight. So, if I were to have a problem with synthetic, then I might need a new head gasket, valve cover gasket, and seals all around....
I think I may just have to stick with the Castrol GTX, but I'll go ahead and get the GTX High Mileage.

Oh, CivicSiRacer, you said you ran your 2000 Si at 6000 all day. Was that stock? I may be wrong here, but I always thought that running a stock motor at high RPMs frequently was a bad thing. Am I wrong? I'd LOVE to be running my Civ a little harder, just never did it because I thought it was bad for my motor.

Yeah I heard that story too about switching to synthetic with high mileage. I purchased my 93 Civic Si in 2006 with 214,000 miles. Switched to synthetic as soon as I got it home since I autocross my car. The head gasket was already starting to go, and I already replaced most of the major seals just as a precaution. The rear main seal was leaking already since the back of the block was covered in oil. You could always try synthetic blend.

I meant that I ran my car over 6000rpms at a track day. 4 twenty minute session. And at an autocross I'm always crossing over into VTEC throughout the course. The Honda engineers wouldn't have built a car that can stay in the high rpms if they knew it wouldn't last. You just have to make sure you keep good maintenance and listen for noise when driving. If you are afraid of driving her hard time for a moped

I hear every little squeak, thump, bang or clunk in every car I'm in. Like my 93 Civic Si right now is making a squeaking sound form the rear suspension. I asked my wife if she heard if and of course she doesn't.