I'm using RP 5w-30 at the moment. Also have some cold start smoking until warming up and when doing WOT runs. Not bad though. Will be switching to Amsoil 10w30 or 5w30 haven't decided yet. Good luck with your choice and make sure to flow your turbos (which I still haven't done yet)
5-30 here also.
If the turbo has too much oil flow, it pushes past the seals and gets into the air intake. I see said the blind man. Too much restriction, and you destroy the turbo. Thin line between love and hate with these cars, and very viscosity dependent. This would make a good thread to know what viscosity everyone is using, and what size restriction.
So I flowed the turbos on 5w-30 RP and got 12oz per 30 sec on both turbos. This was with the car close to fully warm and I didn't have a chance to flow them at full warm. I found a good deal on some RP 5w-30 HPS so I took it for this oil change. I'm going to have to do AMSOIL next time. Bummer huh. I did find out that I may have tapped the drivers side oil return too low because when I unscrewed the line, oil came flying out of the pan from the fitting. That may cause my flow problems because I'm trying to force oil into oil. (Correct me if I'm wrong) Oh well I'll buy a new pan and have everything welded in really good.
I'm going to try talking to Hellion and see what they have to say about why they placed the returns where they did. May be enlightening. I'm with you though; less line and straighter/more sloped path should be better.
Amsoil Sig Series 10w30 or Pennzoil Ultra 10w30. I got a case of the Pennzoil on sale for $3/quart so I'll be running that for the immediate future.
.030 jets. 0 oil. 10oz/30 seconds
2013 Hellion TT, standard precision 6266 JB turbos