Join Date: Sep 2000
Location: san jose, ca usa
try to do it every 3000mi, but you know how that goes, i've slipped into the habit of letting the "change oil" warning light tell me when to do it, which is usually about every 4000. i don't see any leaks around the plug, filter, or intake. it's a Z, so naturally i'm going to get squirrely every now and then, but i don't think i'm particularly hard on the motor. it's not like i blow away cobras off the line every day, just every once in a while. i use standard 5W/30, not synthetic. maybe synthetic would help if the oil's breaking down or burning... i don't know, just thought other ls1 owners could let me know if they have experienced the same. thanks for your suggestions.