I have a 2007 ZX4 ST. Just want some opinions as to which oil performs the best. This is my daily driver, and I live in the Midwest, so temperatures are a factor. Car is completely stock.
You don't drive with your foot to the floor like me redline everyday.I have a 2007 ZX5. I live in Central Illinois. I am the car’s original owner. The car has 213k.
I don’t think the engine has ever been revved over 4k rpm’s.
I’ve used Valvoline convential/synthetic blend 5w20 since I purchased it new.
Oil changes every 3-5k miles. It runs like a sewing machine.
I had the valve cover & oil pan off this past summer and didn’t notice any sludge.