I have a 98 Gst Eclipse with a 16g Turbo. Im planning on building the motor but I was wondering what type of oil should I use? What thinkness in oil or Synthetic? Any opinions? What oil are you using and is there a difference? Rite now im using 10w30

 

10w30 royal purple. thats all that i'll use

 

Royal Purpal full synthetic is the best to use. Depending on how many miles you have on the car is also a factor. I have 91000 miles on my 97 gsx and I am using 10w40. You could also go with red line as well. It is a good oil too.

 

I don't have a high HP application so I use a partial synthetic 10W30 with a fully synthetic Lucas additive and it seems to work great.