Hey everyone.

I just finished getting my y8 rebuilt, and I was wondering what you guys would recommend for oil. I've read a LOT of stuff about minreal vs synthetic on this and other forums, but there isn't much about what to use after a fresh rebuild.

This was actually the second engine in my car. The first crapped out when I spun rod bearing #4 and cracked the block. I was using regular mineral oil (Quaker State 5W30). I suspect I was running low on oil... I swapped in this newer motor with about 50,000 miles on it and started running Amsoil 5W30 full synthetic in it. Had that motor for just over a year until I some how managed to spin #4 bearing in that one too, and I just had an oil change the week before.

I shimmed the relief valve in the oil pump with a 0.030" washer to bump up the oil pressure, and the motor is in the car now. I'm running Quaker State 5W30 for the first 1000 miles, then I'll drain it, and run the next 3000 to 6000 miles with the same dino oil for the break in period.

But what about after the break in period? I would like to keep using the synthetic, but do I really need to? I do like to push my motor and get the revs up high occasionally, so I'm wondering which would be best for a rebuilt y8.

Suggestions?

Thanks.[/align]

 

well after the break in id run full synthetic myself.... thats what im using in my Z6 that i just replaced most the oil seals in.

if ya push the motor hard ya want to have as much lubrication as posible.... so use some synthetic and maybe some oil additive as well.
i always add oil additives to a new motor or every 3 -4 oil changes....
it saved my old cars motor when the oil pumps shaft twisted like a pretzel and snaped, and my dumb @ss drove on it for another 5miles with the oil light on, and then the lifters started knocking and i was at work so i killed it there and towed it home. and it saved the motor! replaced the oil pump and drove the car for another 6months till i sold it.