Originally Posted by iwaylegend95
Black Type II,
Thank you for your reply! Does it harm the engine if I'm using 10-40W oil instead of 5-30W oil?
I'm no expert but I think the heavier oil will lube fine except for very cold temps, I am using 10 40 in mine and the car runs great, even around 25 degrees so far, no dry starts from what I can tell.
The heavier oil will help the oil seals and rings do their job and thus the reduction in emissions, the lighter oil will reduce friction and thus better MPG
I'm sure there's a little more to it with this engine, but what I've heard is if you're high miles and smoking abit it's good to go 10 30 or 40