Hello guys. I really didn't think I would need to create this thread, BUT searching the forums didn't result in any threads specifically for Engine oil recommendations/discussions. (If there is one, and I didn't notice, please accept my apologies).
To start it out, my philosophy on engine oil is something like this:
1 - You don't cheap out when it comes to engine oil and price should not really be a concern (within reasonable limits);
2 - You change the oil in every 5000km (sometimes even less), especially if the engine has been modified for higher power output;
3 - Manufacturers recommended grade is great and all, but I'm pretty sure the manufacturer didn't really consider that a car made for a certain market would be sold in other countries, with different kinds of climates. Therefore, I don't really trust the "hot index" of recommended oils. I've seen suggestions on 10w-30 for Supras. Heck, some newer Toyotas come with 0w-20 oils. wouldn't it be reasonable to expect that 0w-20 will be working uncomfortably close to it's limits in climates where temperature is close to 40-45 Celsius? Same thing goes for supra, IMO 10w-30 is too thin for hot climates. maybe it is ok for northern Japan or English climates but not here. I wouldn't dare put anything less then 40 "hot index" in my evo, heck I don't put anything less even in my bone stock Suzuki swift sport, which, mind you, is a 1.6 NA with measly 125hp
Regardless, I'd still like some advice on engine oil for single turbo supra (probably 500-600hp range), because you people know more than me when it comes to Supras and I value practical knowledge and experience more than pure theory :
Things to consider before giving recommendations:
1) It is not stock. it is a single turbo (HKS t04S). from what I could understand from a Japanese auction paper, some modifications have been made to engine too, bigger injectors and some bits have been added. Not sure if aftermarket oil cooler is present though... (edit: There indeed is an oil cooler installed on the car)
2) It will run in hot climate. soon the temperature here will reach 35+ Celsius, close to 40-45.
3) There are four "good" oil brands from which I can choose from - Castrol, Shell, Mobil 1 and Motul. We don't have Royal Purple here
I was thinking something along the lines of Castrol Edge 10W-60 or Maybe Motul 300V 5W-40 (not sure about the cold index).
thanks in advance for the help