[FirebirdDave]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by David Jones:
Dave, in my cam failure thread you noted a change to a hydraulic roller cam. Was it noisy @ startup with the 10w/30, 10w/40 etc oils you used? What brand cam and lifters is it? I notice extra valve train noise at cold start-up with my car also. I've never run 5w/30 but have noticed that the noisy period with 20w/50 was louder and longer than any other oil I used. I put that off to it being thicker and harder to pump through the system when cold. Did you find the Mobil 1 caused or increased any oil leaks? <HR></BLOCKQUOTE>
David you are asking 3 questions noise of the roller cam first. I do think the hydraulic roller is a little more noisy than the flat tapets I have run in the past. Im not sure about why in my case this was the most radical cam I have ever run so that may contribute to that noise.
I am running a comp XHR288 cam and the comp cams hydraulic roller lifters. I used to run the 20W50 and that stuff is so thick it is certianly the most noisy because its so thick.
As far as oil leaks I have been very luck on this lattest engine. I have had problems inthe past with the Mobile1 and the rear seal, not this time though. Some folks swear buy Royal Purple saying it tends to stay in the engine better than the equivelent Mobile1. I did find I semmd to leak less when I ran it but its more expensive and as I said Im not having any problems right now with oil leaks.