[AllmotorD]

If the motor is new I don't recommend running synthetic. 10w30 Castrol or your preferred brand is good and number 8 or 9 ngk gapped to about 25 thou. Spark plug gap also depends on how much boost you are running. My buddy has a 2.0 turbo with about 45 psi. Made 710 whp. He runs Castrol 10w30 and NGK 9 gapped to 18 thou!

 

[AllmotorD]

Talk to any engine builder why you should not break in a motor on synthetic. I don't know the reason why I just listen well to others that know more than me!

 

[AllmotorD]

When you buy a Viper or a Z06 the motors are broken in before you get it! Companies wouldn't let an engine of that caliber off the line and into your hands without putting it through the paces yet!

 

[AllmotorD]

Well whatever.. Obviously it doesn't matter.. If you are going to use synthetic at least buy Motul or Amsoil. And a Honda filter should be the only thing that you put on the motor. S2000 filter will work too if you want to pay the 25 bucks.

I built my motor 35,000kms ago. It is an Allmotor A6 with 11.5/1 comp. I have ran nothing but Castrol GTX 10w30. Ran about 65 passes at the track this year. Drive it to work in minus 35 degrees Celcius temperatures without the aid of a block heater and haven't had a single problem yet!