Probe Dude wrote: >Hard for me to see sludge buildup in an engine where the oil is changed >every 3K miles. You must be new to the SR20DE. :-) That's not to say it's a piece of crap. It's just that there *are* a number cases of it happening. George Roffe Houston, TX 91 SE-R (well modded) 91 G20 (well modded) 84 944 SCCA ITS race car under construction <http://home.earthlink.net/~geo3/>