Quote:
Originally Posted by killboy
What pressure were you seeing with 5w30 that you feel is too high?
The manual is also referring to a stock engine. Forced induction greatly increases torque, which greatly increases pressure on rod bearings. Our rod bearings are already unusually narrow, and the center pair share an oil journal. This engine was not designed for the torque loads of forced induction. That is why they have not added it despite all the demand. Your days running 0w or 5w are on borrowed time IMO. I would advise shim the pressure release valve and run 10w or higher on boosted FA20s.
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6bar hot at the pump outlet. Stock setup oil can get to 140C and its thin and weak with 0w20.
At 110C the film strength is considerably stronger and thats only on trackdays.
On the road I struggle to see over 90C.
Time will tell if I spin a bearing but lots of people on this forum use 0w20 with an oil cooler and forced induction.
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