I was taught that a little bit under full is a better than little bit over full. Do to potential foaming if you're over full which can affect the film strength of the lubrication. But I wouldn't think anything under a half qt. would make a real effect either way.
Originally Posted by mpgo4th
I'm about 500 miles away from servicing my wife's 2018 with a 2.0 Turbo GDI. I'm thinking about running a smart change box of Havoline Pro DS 5w30 for this OCI. The manual says the car holds 5.7 quarts while the box of oil has 6 quarts in it. It seems near impossible to get the oil perfectly filled to that amount so I'm thinking I'll just pour all 6 in it. I know it wouldn't normally hurt anything but with the direct injection causing fuel dilution I'm second guessing putting the oil up the stick to start with. Any thoughts?