Originally Posted By: Spetz
My engine uses oil, would something like Wynn's 100,000 km + Engine Treatment help, or is it best to just top up?
What kind of vehicle? How much oil is it using? What is the mileage? What is 'normal' oil consumption for this make/age/mileage vehicle? You probably won't get that last bit of information on this site, but if there is a user group for your vehicle, someone there might give you some idea of typical oil usage. Normal oil usage varies widely between brands of vehicles, so it's worth your effort to investigate this.
You did not say this, but is your engine using oil past the rings, or simply leaking on the ground, or ????
Try to get a fairly precise measure of how much it is using (1 quart per 1000 miles or 1000km). That way. you will be able to measure progress, if any.
As for Wynn's, it's a thickener. If you really think thicker oil is the answer, then just buy thicker oil to start with (10w-40 instead of 5w-30). There is at least one downside of doing this - your engine will be less efficient, pushing through the thicker oil.
Final thought: if economy is the primary goal, just top up. Adding a quart now and then is almost always cheaper than additives or other fixes.