Hey guys, I'm new to this board but old to LS1.com. I'm looking at changing my fluids this spring when I take my car out of storage. It's a 2001 WS6 t/a, 6 speed. LS1. Oil - Last year I tried mobil 1 5-30, then 10-30, and redline 10-30. I noticed that my motor was the quietest with the mobil 5-30. I don't know why that is, when everyone tells me that it should be quieter from a 10-30. But aren't they the same when hot ? they both have a viscosity or 30 right ? I'm not by any means an oil guru, but this year I was thinking about running 5-30 redline because I know it's a little better than mobil 1, and my motor was it's quietest with 5-30. plus GM recommends 5-30. But I've heard this is only for fuel economy, is this true ?? I changed my oil at 450 miles, then 1500, then 3000, then 4286, which is what my car's at now. Before I stored my car, I was wondering about the storage of the motor, and what needed to be done to prep it. A tech at the dealership told me to dump in this E.O.S assembly lubricant into the crank case and that would "stick" to the cam and coat the motor during winter to prevent any internal corrosion. Like an idiot I did this and my motor make this horrible ticking noise . So I drained it out, and changed the oil three times after that, driving it about 20 miles in between each change, in the hopes to flush out all that crap. I also added seafoam to the crank case two of the three of those times. That same ticking has always been there but seems to get louder with the increasing thickness of the oil. Worst with that crap in there, little bit with 10-30, and almost quiet w/ 5-30. Anyways, I hope I didn't wreck anything with that crap running in there for about 5 minutes. After that I looked at at the bottle and it said "do not add to engine oil". Also, my car has fresh oil and a new filter, but has been stored for 6 mos. Should I change the oil before I start it due to any moistrue accumulation, or should I change it after all the old gas is burnt out, and the fuel injector cleaner has been burned, because they might contaminate any new oil ?? Rear End - I think I have the torsen diff, and the dealer did a 1500 mile service on it, but I want to change in fresh fluid this year. can I run synthetic fluid ? if so what is the best ? do I need to add that GM friction modifier ? I want to take care or my rear end, but don't want it too slippery so that i'll get one wheel burnouts. Transmission - That fluid hasn't been changed yet, at 4286 miles. I have a 2001 t-56. What are my options in terms of a really good fluid. I know that GM recommends ATF, but would I be better off with synthetic or conventional ?? Thanks guys in advance.