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.

 

honestly i wouldnt even waste money on a sythetic oil, imo, i would run to canadian tire and rock there premium stuff like i already do on my d series.

 

I hear a lot of good things about Royal Purple, but no hard proof of what kind of oil works best. Personally, I just use Valvoline full synthetic. It's fairly cheap, about 4 bucks a quart, versus the 6 or 7 for Mobil 1, which I think is overrated by the way.

 

Personally Id go with Royal Purple or Castrol Syntec..
When we couldnt get regular mineral Castrol at work for a while we used Quaker State simply because no one would buy it off the shelf in the store lol but it imo it sucked..we had more cars come in for bottom end problems and oil leaks in that month and a half than we did in 3months of regular buisness using the Castrol..

Most people with modified cars requested Royal Purple or Syntec and paid the difference though..

 

The cost of the synthetic isn't really an issue. I have a good contact where I can get Amsoil 5W30 synthetic for about $20 a gallon, so really only $3 to $4 more than mineral oil.