Optimum oil level=less resistance
I never thought about this until I tried to explain the results I was coming up with. I have a 01 Corolla which as most know tend to burn a little oil with higher mileage. I noticed that topping the oil off at fuel stops on highway driving trips cause a noticeable drop in MPG.
The oil never gets low enough for the check oil light to come on, but the level on the dipstick is about half way down. I fill to the full mark. My question is the minimum oil does the engine actually needs to achieve full lubrication. Read that question again before you reply with a biased opinion and no factual information. THIS IS A TECH THREAD NOT UNSUPPORTED OPINIONS.
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