Hi Guys,

Recently had my B16 turbo'd, had the engine rebuilt, forged internals etc,

Anyway, I didn't think too much about the oil at the time and just dropped some 10w40 Part-Synthetic in there and trailer it to the tuning company...

The gave it a quick tune on the dyno but advised I take out the part-synthetic and drop in some crappy mineral which should seat the rings into the block.

I drove it back though which was a good 90 miles and drained the oil anyway as I had to sort out a couple of leaks.

What should I put back in there now? Mineral, Part-Synth, Full-Synth? Will it make a difference now as i'm sure after 90 miles the rings are either seated good or bad!

Whatever oil it is, it will only be in there for a couple hundred miles (also advised) and then i'll be going for full-synth high brand oil when it go's for it's PROPER TUNE :D

 

I broke mine in on Castrol or Valvoline 5w30 then after that redline 10w30 and BOOST!

 

So I take it if it starts it's life out on Semi-synth it ain't a problem?

 

Could take longer to seat the rings
If its turbod and you drivin it hard already then the rings are probably seated