Did a little reading at work today about some 5w-30s shear down close to 5w-20. So if a car specs 5w-20 recommended, but 5w-30 can be used (higher temps etc), why not just go and stick with 5w-30 if it shears toward 5w-20 since 5w-20 is the most recommended if it specs for it.
Thinking in terms of GDI & dilution - specs 5w-20 and dilution compared to 5w-30 and dilution.
Thinking in terms of GDI & dilution - specs 5w-20 and dilution compared to 5w-30 and dilution.