Lanevo, I'm using Sunoco racing oil same like S9, already done 3000km+ now, so far so good, looking forward the result during 4000km & 5000km. We are using 17.5W50 grade bcos in our M'sia tropical weather make our 4G63 engine become hotter. It might not be the best oil in market, but is 1 of the good oil around & it have similiar oil property & quality with HKS, Redline, Motul & with very attractive price for MLOC & zth member. more detail can get it from
www.sunoco.co.jp :_:
Basically, if u looking some thing which can provide u good protection for our engine even during hot temperature is better go for full synthetic engine oil made from ester base which have better thermal stability.
Cannon, actually our engine should use at least 5W40 engine oil for better protection when running under harsh conditions of hot temperature, high revolution and heavy load. If your car with some mod or higher boost, should get higher viscosity like 5W50. 5W30 is too "thin" for our engine, yes u can feel the engine is lighter & more responsive, but oil will break down easily during hot temperature & harm to your engine, unless u seldom push the car to limit, seldom boost it or seldom trap in traffic.:_:
Mari mari, siapa mau Sunoco engine oil with attractive introduction price.:shades_smile:
Spec that i have.
Street spec - Ultra Synthetic 5W40, 5W50
Racing spec - Xpower 12.5W40 & 17.5W50